Dell GK479 Battery, Dell Inspiron 1520 Battery, Dell Laptop Battery

Specifications:
*	Product ID:	NDE062
*	Battery Type:	Li-ion
*	Battery Capacity:	4600mAh
*	Battery Volt:	11.1V
*	Battery Color:	Black
*	Battery Weight:	447.93g
*	Dimension:	209.90 x47.50 x20.40mm

*	This replacement laptop battery can replace the following part number:
	GK479, FP282, 312-0594, 312-0504, 312-0590, 312-0576, 312-0575, 451-10476 See More ...
*	This replacement laptop battery is also compatible with the following models:
	Inspiron 1520, Vostro 1700, Inspiron 1721, Inspiron 1521, Vostro 1500, Inspiron 1720 See More ... Dell GK479 Battery Articles & Tips A new Dell GK479 battery comes in a discharged condition and must be charged before use (refer to the devices manual for charging instructions). Upon initial use (or after a prolonged storage period) the Dell GK479 may require three to four charge/discharge cycles before achieving maximum capacity. New Dell GK479 battery needs to be fully charged and discharged (cycled) a few times before it can condition to full capacity. Rechargeable batteries undergo self-discharging when left unused. Always store a battery pack in a fully charged staged for storage.When charging the Dell GK479 battery for the first time the device may indicate that charging is complete after just 10 or 15 minutes. This is a normal phenomenon with rechargeable batteries. Remove the batteries from the device, reinsert it and repeat the charging procedure. It is important to condition (fully discharge and then fully charge) the Dell GK479 battery every two to three weeks. Failure to do so may significantly shorten the battery's life (this does not apply to Li-ion batteries, which do not require conditioning). To discharge, simply run the device under the battery's power until it shuts down or until you get a low battery warning. Then recharge the battery as instructed in the user's manual. If the battery will not be in use for a month or longer, it is recommended that Dell GK479 battery be removed from the device and stored in a cool, dry, clean place. Invest in a good charger for your device. Ni-MH batteries should not be charged in a NiCad charger, unless the charger is specifically made for both chemistries. There are cheap chargers and there are expensive chargers. Make sure the charger you get has good reviews and is well made. Chargers with micro-controller chips are usually the best choice of your device. Be sure to store your battery properly. Do not leave your batteries in a hot car, or in humid conditions. The best storage conditions are a cool, dry place. The refrigerator is fine if you stick in a packet of silica gel with your Dell GK479 battery in a sealed bag to keep them dry. It is a good idea to charge your NiCad or Ni-MH batteries fully before use if they have been in storage.
*	Brand new with 1 year warranty

How Things Work: Lithium-ion batteries

A ubiquitous and essential appliance in the lives of college students, the laptop has become a modern, mobile workstation and also a source of endless diversions. But what if it did not exist? If something unfortunate were to happen to the precious battery that keeps a laptop alive, it would become but an inert hunk of unresponsive metal. Thus, it is important to know how the lithium-ion battery that powers a laptop works and become knowledgeable about how to prolong its life.

The battery inside a laptop is lithium-ion, which means that its electrodes (the conductors in a circuit that connect non-metal parts) are made of lithium and carbon. The positive cathode is made of lithium cobalt oxide, which emits positive lithium ions; the negative anode is made of carbon. The electrodes are placed in a gel electrolyte, a material that conducts electricity, and separated by a sheet of perforated plastic. Ions are free to move throughout the gel, but there is an initial charge difference between the electrodes, with the positive ions concentrated on the cathode.

When recharging a laptop battery, the lithium ions move from the cathode to the anode and create an electric potential difference (a voltage of about 3.7 volts), according to When the battery is discharging, the lithium ions move back from the anode to the cathode. Total discharge occurs when the return of ions to the cathode decreases the voltage to zero. A lithium-ion battery that is completely discharged will be unusable, though, so these batteries have a failsafe mechanism that shuts them down before they discharge too much. This system, which itself is a small computer attached to the battery pack, monitors the charging levels and temperature of the battery to prevent dangerous usage. This monitor uses power, which is one of the reasons that a battery not in use will still lose charge and experience a decrease in voltage over time. This is how batteries can become ruined even without use.

To prolong battery life, do not allow your laptop battery to drain all the way to 10 percent or lower without subsequently charging it. Contrary to popular belief, there is no need to completely discharge, or “deep discharge,” a laptop battery or any other kind of battery, including those in cell phones and iPods, each time it is used. In addition, lithium-ion batteries can handle hundreds of repeated cycles of charging and discharging. The only possible issue, therefore, is not the process of charging, but the maintenance of a minimum voltage. When a battery goes to zero voltage, it will no longer be able to recharge, and the only solution is to buy a new one.

From the moment lithium-ion batteries are manufactured, they constantly degrade and lose charge, so a laptop battery will only last two to three years, regardless of usage. Make sure to check the manufacturing date when you buy a new battery. An unused battery that has been sitting around is just as degraded as one that has been in use for the same amount of time. Heat will also degrade lithium-ion batteries faster than normal. According to Popular Science magazine, critical temperatures for a laptop battery occur around 70 degrees Fahrenheit. Storing a lithium-ion battery at temperatures at or above this level will degrade it more quickly.

Lithium is a very reactive element, especially compared to lead and nickel, which are what car batteries (lead-acid batteries) and electronic toy batteries (nickel-cadmium) typically contain. Hence, lithium-ion batteries can store a lot more energy than typical batteries — about 150 watt-hours per kilogram of battery, However, since lithium-ion batteries have so much energy, they also warm up quickly from the heat radiated during discharge. When the battery becomes too hot, it releases the polymer gel, which can be ignited by heat or a spark. This ignition is what causes some laptop batteries to catch fire.

Besides laptops, lithium-ion batteries power many modern handheld electronics, including digital cameras and cell phones.

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NewerTech Lowers Price on Notebook Battery Charger/Conditioners

Woodstock, Illinois - Newer Technology, Inc. (NewerTech(R)), a leading developer of Macintosh(R), PC, iPod(R), iPhone(R), and iPad(TM) performance upgrades and accessories, announced today it has lowered the Manufacturer's Suggested Retail Price on its entire line of NewerTech Intelligent Battery Charging/Conditioning Stations, the only complete line of chargers/conditioners on the market today designed to keep batteries in optimal charged condition for maximum "unplugged" usage.

Available immediately and starting as low as $99.00 - up to a 33% reduction from the previous MSRP -the NewerTech Intelligent Battery Charging/Conditioning Station is available for the following Apple notebook models:
* MacBook Pro 15" Unibody
* MacBook 13" Unibody
* MacBook Pro 17"
* MacBook Pro 15"
* MacBook 13"
* iBook G3/G4 12"
* iBook G3/G4 14"
* PowerBook G4 12" "Aluminum"
* PowerBook G4 15" "Aluminum"
* PowerBook G4 17" "Aluminum"
* PowerBook G4 15" "Titanium"

The NewerTech Intelligent Battery Charging/Conditioning Station is available for ordering from NewerTech's exclusive distributor, Other World Computing (OWC(r)), as well as through the retail channel. For more details on this adapter, as well as reseller inquiries, visit the Other World Computing web site. For more information on NewerTech's complete line of accessories and upgrades for Macs, PCs, and iDevices, visit the NewerTech web site.

"Intelligent" Design Takes Guesswork Out Of Battery Charging
NewerTech Intelligent Battery Charging/Conditioning Stations are ideal for users who have one or more batteries and want to keep their batteries in optimal charged condition. The two bay design can accommodate two batteries and when the first battery is done charging, the unit "intelligently" begins charging the second battery. In addition to charging batteries quickly and correctly, the deep conditioning feature can bring back additional life to a battery that's started to show its age.

NewerTech Intelligent Battery Charging/Conditioning Station Features:
* 2 Bays: 1 bay charges, 1 bay charges & conditions
* 2 Year Warranty
* Power Input/Output: 120~240V 50/60Hz 1.5A / 24V 2.3A, regulated

"Whether a user has one of the latest MacBook models or a still useful legacy Mac notebook, the NewerTech Intelligent Battery Charging/Conditioning Station is ideal for getting the longest runtime and lifetime from the battery," said Grant Dahlke, Brand Manager, NewerTech. "By both charging and deep conditioning the battery at the same time, users can save both time and restore new life to older batteries."

Complements Complete Line Of High Capacity Batteries:
In addition to its line of battery chargers/conditioners, NewerTech also offers a complete line of NuPower(r) high capacity replacement batteries from $79.99 MSRP for MacBook Pro, MacBook, Powerbook G4/G3, and iBook G4/G3 notebooks with up to 68% more capacity than original Apple batteries. For more information on NuPower high capacity replacement batteries, visit the NewerTech web site.

Since 1984, Newer Technology, Inc. (NewerTech) has been recognized as the leading developer of performance upgrades and accessories for Macintosh and PC computers, iPods, iPhones, and iPads. NewerTech is headquartered in Woodstock, Illinois.

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We are a manufacturer representative and distributor of notebook battery,laptop batteries,laptop AC adapter,camcorder batteries, digital camera batteries, power tool batteries, battery charger and other accessories.. All batteris are brand new, high quality, 1 year warranty!

Is it Possible to Overuse Your Laptop AC Adapter by Keeping it Plugged in Too Long?

People who use their laptops excessively often wonder if they are actually harming their laptops in some way. This apprehension is more pronouncedly felt when the laptop is used constantly over its AC adapter. The direct question that’s asked here is whether the laptop AC adapter will burn out because of being constantly connected? Or will there be some kind of direct damage to the laptop itself?

The common problem that’s noted here is of overheating. Any electronic device or component heats up when electricity is constantly passed through it and laptop AC chargers and the laptops themselves are no exception. There have been cases where laptop AC chargers have burned out when used for too long. However, this is not the rule-there are several people who use their laptops over their AC adapters constantly and still nothing untoward happens.

The bigger fear is that the laptop itself might burn out. Now, while that’s a possibility too, it is one that can be easily averted by providing good ventilation for the laptop. This can be done by adding a laptop fan which will help to dissipate the heat.

Another problem that might happen is the burnout of the battery. Though the AC adapter mightn’t be harmed directly, it might direct an excessive amount of electricity into the battery which might retard its functioning. Laptop batteries work in terms of charging cycles and such constant electricity supply can be harmful to their longevity. Moreover, the laptop batteries might get used to the AC adapter and might not function as effectively as they did when they were newly out of the shop. For instance, if your battery gave you a charging of 3 hours earlier, consistent AC adapter use might reduce it to 2.5 hours. It is therefore advisable to remove the battery from your laptop if you intend to keep it on for a long time directly through the AC mains.

There are other things to consider, such as the excessive wear and tear of the components. Laptops, after all, are built for portability and that implies they will be rebooted often. That’s the reason most laptops won’t be able to take the pressure of constant use through the electricity mains directly.

HOT AC Adapter

Toshiba PA3589U-1BRS Adapter

Toshiba PA3516U-1ACA Adapter

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2 Tips For Finding Cordless Drill Replacement Batteries

Often it can be extremely difficult to find cordless drill replacement batteries, especially if your cordless drill is an older model out of production. It seems many stores do not carry older battery packs just to entice you to buy the latest new drill, well, lets not let that happen. This article is here to help you find a battery pack.

When you get frustrated looking for a replacement battery and end up at a dead end, use these two tips to get back on track.

Have the model number for your drill. This number should be located somewhere on your drill, and represents the serial number of the product. You can use this number to help you find the appropriate battery as many online stores list replacement batteries with the number in the listing.

If using the drill's model number doesn't work then a better idea is to find the serial number on the battery pack. Doing a search for this number almost always returns a good result.

These are just two tips on how you can better your search for cordless drill batteries. Looking for one can be frustrating, but perhaps the most frustrating part is having to pay an arm and a leg for a new battery pack. I guess when a seller knows you need it badly they think they can charge a hefty price for it.

It definitely isn't fair to have to pay so much for a new one, but other than finding one somewhere for cheaper than other places you could always try to revive your battery. There are a couple of how-to's out there that show you exactly how to revive a battery back to life. One video I saw used a welding tool to juice it back up.

If you know where to look then you can definitely find a pack for cheaper. I know of one place where you can find cordless drill batteries for cheap (which just goes to show how many places are overcharging...). It also has some helpful tips on how you can restore your battery back to life and save some money. All in all its just an excellent place to visit for your cordless drill battery needs.

How to select the correct laptop battery and laptop ac adapter for your laptop

Finding your laptop Brand & Model

Your owner’s manual should have the brand and model on the front cover. If you don’t have your owner’s manual then almost every laptop has a manufacturer’s label on the bottom of the computer. This label should have the brand and model number on it.

Once you have the Brand and model of your laptop, use the Search Wizard to select your Brand and Model. Once this is done it will display the compatible Battery and AC Adapter under the Product column.

Here are some models from the major brand laptops:

COMPAQ Laptop Battery: Armada, Business Notebook, Evo, OmiBook, Pavillion, Presario

SONY laptop battery: VAIO

Dell laptop battery: Inspiron, Latitude, Precision, XPS

IBM laptop battery: Thinkpad

TOSHIBA laptop battery: Satellite, Satellite Pro, Dynabook, Portege, Qosmio, Tecra

APPLE laptop battery: MacBook, iBook, PowerBook

ACER laptop battery: Aspire, Travelmate, Extensa, Ferrari

HP laptop battery: Pavilion, Armada, COMPAQ Presario

For Windows 98 – Vista Only

If all else fails, turn on your computer and follow these instructions:

Go to your desktop.
Click ‘Start’ on the bottom left of the screen.
Mouse over ‘Programs’ > ‘Accessories’ > ‘System Tools’
Click on ‘System Information’.
Your computer’s manufacturer, model, etc. will be listed on the following page.

Selecting the correct laptop ac adapter

Before purchasing an AC Adapter you need to make sure make the AC Adapter will give you the correct voltage and suitable current output.

To find out the voltage & current, turn your laptop over and look for a label, sticker or writing which shows the voltage and current, it should look something like the examples below. The voltage figure will have a “V” after the number i.e 19V and the current will have a “A” or “mA”. i.e 3.15A. You can also find these shown on your original AC adapter if you have it. The Voltage must be within 10% of your original AC Adapters Voltage. The Amps may be higher but they cannot by lower.

If you are purchasing a universal AC Adapter or Car Charger you will need to work out the Watts of your original AC Adapter and select the universal AC Adapter or Car Charger with the same Watts or next highest Wattage. You can work out the Wattage by multiplying the Voltage by the Amps i.e 20V X 3A = 60 Watts. There is no 60 Watt AC Adapter so you will need to select the next step up which is the 70 Watt AC Adapter.

PLEASE NOTE: If the wattage requirement for your laptop is lower than the 60W or 90W output of the adapter, it will not damage your laptop, your laptop will only take the amount of power it requires. I.E. If your laptop needs 45W, then either the 60W or 90W will work OK. If your laptop needs 80W then you will need the 90W one as the 75W one will not be powerful enough.

Once you have selected you Brand and Model from the Laptop AC Adapters Search Wizard it will display the compatible AC Adapters under the product column. Once you have clicked on the battery you will be redirected to the page displaying alllt he information about the AC Adapter. Click on the photo of the AC Adapter to enlarge the image and view the tip dimensions to ensure they are similar to your original AC Adapters tip dimensions.

Selecting the correct laptop battery

Batteries have two main ratings on them: Volts and Amps. Because laptop batteries do not carry a very large amount of power when compared to larger batteries such as car batteries, most companies show their ratings with Volts and Milliamps. One thousand Milliamperes equals 1 Ampere. When buying a battery, always go for the battery with the most Milliamperes (or mAh).

Once you have selected you Brand and Model from the Laptop Batteries Search Wizard it will display the compatible batteries under the product column. Once you have clicked on the battery you will be redirected to the page displaying alllt he informationa about the battery. Ensure the battery is the same shape as your original and most importantly the Voltage is within 10% of you original batteries specified Voltage.

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Lenovo's ThinkPad Edge 14, why it's a slick all-round business laptop

Lenovo's ThinkPad ( http://www.laptop-battery.org/lenovo-laptop-battery.htm ) range has been a stalwart of the business landscape. It is a product line that seldom features cutting-edge design, but it's always robust and ready for the demands of on the go business users.

The ThinkPad Edge 14in uses an Intel Core i3-330M CPU, integrated HD graphics and 2GB of RAM (to this end it comes with the 32-bit version of Windows 7 Professional).

Storage is via a 250GB 5400rpm hard drive. The 14in screen uses the common 1366 x 768 resolution, and while it isn't the greatest we have seen it copes adequately with text and office tasks.

The screen is topped with an inbuilt microphone and webcam for videoconferencing needs, while the speakers are neatly embedded into the lid between the hinges, under the screen.

This hardware may not be jawdropping but it is perfectly adequate for the intended use. 2D performance pips that of our current A-List business laptop, but the life of the six cell battery is disappointingly average.

One of the most impressive aspects of the ThinkPad is the design. Rather than the whizz-bang glossy approach taken by nearly every other laptop manufacturer, Lenovo has gone for an incredibly functional design.

The screen has some give to it, but still feels solid. We were also enamoured with the isolated key keyboard - a departure for Lenovo - that feels as though it has been designed to cope with the kind of beating that a business laptop will take.

The distinctive dual Trackpoint and Touchpad design means that those familiar with either technology can use the laptop easily and as a side effect it pushes the keyboard towards the back of the chassis and provides a very comfortable palm rest.

It does lack some of the more future-proof technology that we are beginning to see on some manufacturers' laptops. While there is a single eSATA port, and an Expresscard slot, the three USB ports are USB 2.0.

There is the standard combination of D-Sub and HDMI outputs for the integrated graphics, giving options for attaching to external displays.

Overall the ThinkPad Edge 14in is a solid, all-round business laptop. It doesn't pretend to be a sleek consumer design; it is tailored to the rough and tumble environment in which a business laptop resides.

Performance is great but we do worry that the battery life falls behind some competing models.

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Acer Aspire TimelineX 4820TG 14-inch Laptop Review

The Acer Aspire TimelineX 4820TG is a 14-inch laptop that packs in an Intel Core i5-430M processor and dedicated ATI Radeon HD 5650 graphics, making it a powerful 14-inch laptop – at least on paper. It also claims to offer eight hours of laptop battery life.

The Acer Aspire TimelineX 4820T-3697 is a thin laptop with a somewhat industrial, business-like design that is complimented by a slick brushed aluminum cover. Under the hood you get a 2.4GHz Intel Core i5-450M dual-core processor with Turbo Boost Technology and 3 MB L3 cache. Intel Turbo Boost technology helps provide you with more performance when you need it. The way it works is that the processor automatically adapts its speed according to whatever you’re doing at the moment. So when you start doing a processor intensive task, the processor will get faster. The processor will then slow down when you’re doing low performance tasks. This helps contribute to the energy efficiency of a PC and can help improve battery life. And in this case, the Acer Aspire TimelineX AS4820T’s battery life really excels.

Other features include a 500GB 5400RPM hard drive, 4GB of ram, Intel HD Graphics, 4GB of ram, a 8x SuperMulti DVD±R/RW drive, 1.3megapixel HD web cam with a 1280 x 1024 resolution, stereo speakers with third-generation Dolby Home Theater audio, Wireless-N Wi-Fi, ethernet, Bluetooth 3.0, a multi-in-1 digital media card reader, 4 usb ports, and HDMI output for playing back movies on a TV or external LCD.

The Acer Aspire TimelineX 4820TG is well built, and although not quite ultraportable, it’s thin and weighs 2.1kg (with a six-cell battery) and has a form factor that’s easy to carry around compared to other 14-inch laptops – like the Dell Studio 14 Artist Edition and Acer Aspire 4740.

This young Timeline member comes packaged with a 3-pin plug to AC adaptor for the supplied AC adaptor that juices up the machine of course. A quick guide, limited product warranty and international travelers warranty are included among the paperwork that comes with it. There’s also a soft cleaning cloth for those who are in the habit of wiping down their laptops instead of counting on their full-sleeved garments to do the job miraculously like yours truly. Acer has been more generous with the software as compared to the hardware and other frills and fancies. The laptop is loaded with the Windows 7 Home Premium OS, Norton Online Backup Security, McAfee Internet Security Suite 2009 trial, Microsoft Office Personal 2007, Microsoft Office Trial, Adobe Flash Player 10, Acer Video Conference Manager, Windows Live Essentials, a host of trial versions of games and more.

The high-definition Acer Cine Crystal LED-backlit TFT LCD impressed us with clear visuals, thanks to its 1366 x 768 pixel resolution. We could also easily execute our tasks faster with simultaneous multi-window viewing, a praiseworthy innovation for those who’d like to close and open windows at regular intervals for a flake of fun (just a guess). The image clarity is good enough to keep you grooving over your favorite artists’ videos or favorite comedy flicks for long hours. The screen is definitely bright, like what we’ve seen earlier from Acer, and didn’t disappoint us with any dim horizontal angle viewing.

Overall, the Acer Aspire TimelineX 4820T is a well designed laptop that doesn’t sacrifice notebook battery life in lieu of performance. It has some flaws – including a mediocre LED display, but for the price you’re getting a capable machine. The Acer Aspire TimelineX AS4820T recently dropped in price from $849 on Amazon to $796.73 The laptop also comes with a one year International warranty.

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Top 10 Back to School PC Buying Tips

We give you the ten top tips for finding that perfect desktop or laptop for your schooling needs.

The return to the school year is often fraught with various decisions to make. One of the most important is what kind of PC you should get, particularly if you're off to college. We give you the ten top tips for finding that perfect desktop or laptop for your schooling needs.

1. Desktop, notebook, or tablet? If you like to type notes in class or work on papers in the library (or the quad), choose a notebook. Tablets work well in classrooms because the writing is noiseless, and if the professor draws diagrams, you can too. If you'd rather have high performance or a larger screen over portability, and cost is a top priority, choose a desktop.

2. Picking the right processor. For a desktop system, you don't necessarily need the fastest processor. A 1.6 or 1.7GHz processor is fine for writing papers and surfing the Internet. To help with better multitasking or multimedia tasks, go with a dual-core or better yet, a quad/six-core CPU, such as the Intel Core i5, i7, or the AMD Phenom II X4 or X6.

When picking a laptop, look for a mobile processor that's strong but won't run down your laptop battery too fast. A dual core Intel Core i3 or Core i5 processor will usually does the trick, but you should also pair it with a decently sized battery. Research the battery life. Not all systems fare the same even with the same processor; battery lives vary from 3 to 7 hours.

3. How far to go with graphics. If your schoolwork is basic word processing, spreadsheets, Web surfing, and e-mail, then an integrated graphics chip will suffice. If you do 3D rendering or have a yen to do digital-editing, steer clear of integrated graphics and get the best graphics card you can afford. If you're into gaming, a graphics card can make or break a winning streak. If you're a middle-of-the-road gamer, go with cards like the ATI Radeon 5850 or the Nvidia GeForce GTX 460 for desktops and the ATI Mobility Radeon 5000 series or the Nvidia GeForce 300M Series for laptops. Toshiba PA3641U-1BRS battery

4. Hard drives (where size and speed matters). Get a big hard drive—500GB minimum on a desktop and 320GB for a laptop—if you're tackling Video Editing 101 and hope to graduate with Spielberg honors. Look for systems with an eSATA port, which can take storage beyond the included drive and not be hampered by USB speeds. USB 3.0 is a new interface standard that's faster (with the right port), plus it's backwards compatible with USB 2.0.

5. Upgrade to 4GB of memory. Even the most affordable systems come standard with 4GB of memory (1GB for netbooks). It's the least expensive way to squeeze the best performance from your system. We recommend upgrading to at least 2GB on a netbook, and if a bigger laptop doesn't have 4GB, then you should look elsewhere. The additional cost of upgrading is minimal, and the performance boost you get in return is definitely worth the money.

6. The importance of being wireless. All laptops today have wireless capability, some more than others. Wi-Fi is the most common wireless method, and most campuses have wireless 802.11 networks in place. Some schools will even allow you to setup your own router in your dorm room, in case you want a stronger signal. Laptops that offer 3G connectivity are growing in numbers, though monthly plans are still rather expensive. But being connected to the internet at all times is a luxury, especially during long train or bus commutes to class.

7. DVD burner or bust. Don't settle for anything less than an optical drive (or drives, if you're getting a desktop) that burns and reads dual=layer DVDs. Nearly all desktops now come with dual-layer DVD+/-RW drives that can write to optical discs that hold up to 7.95GB of data. BlurRay drives are coming down in price, and you can find one in a laptop or desktop without going over budget. With it, you enjoy all the latest flicks in full 1080p glory. Of course, buying a laptop without an optical is not a bad idea if you rarely use one. You'll have more room in your backpack for textbooks or gym clothes.

8. Easy on the eyes. Consider a 24-inch LCD monitor for your desktop; it's a good-size display that will still save space on your tiny dorm room desk. Bigger can still be better: If you have the room, 27-inch LCDs are the new big monitors on campus. Regardless, look for true 1080p or 1,920 by 1,080 resolution, so you can watch online videos and Blu-ray in full 1080p HD.

On a laptop, you want a screen that won't make you squint halfway through your midterm paper but isn't so huge that it weighs down the system. Laptop screens add weight and rob battery life as they go up in size. The key is a balance between screen size and portability; 13- to 15-inch screens seem to achieve this best.

9. Windows 7? Most people will choose between different versions of Windows 7 if they're buying a brand new desktop or laptop this year. The version of Windows 7 hinges on what type of laptop you buy: A mainstream laptop or desktop will more often than not have Windows 7 Home Premium, whereas a netbook will ship with Windows 7 Starter Edition. The differences between the two are minor at best, with Starter Edition lacking some visual eye-candy, tools like Media Center and Mobile Center, and placing a 2GB maximum on system memory. Other Windows 7 versions like Professional, Enterprise, and Ultimate are tailored to more sophisticated users, like business professionals. A 64-bit version of Windows 7 will allow your PC to address system memory beyond 3GB, which is why the Starter Edition is capped at 32-bits.

10. Know your Warranty. Almost every desktop or laptop is backed by at least a 1-year complimentary parts and labor warranty (Systems bought from a retailer like Costco actually come with a 2-year warranty). Extended warranties are also available, but that depends on who you are as a user. The standard warranty doesn't cover accidents that stem from a spilled drink, a little brother that rips off a button, or a drop on a hard surface. Most vendors sell accident coverage as a separate plan, on top of extended warranties that work on top of a standard one, so you might end up spending close to $300 for three years of coverage. Apple offers a maximum 3-year extended warranty ($250), while most Windows-based desktop and laptop vendors will offer up to 4 years. Toshiba PA3636U-1BRL battery


Our rule of thumb is that if the warranty costs more than 15 percent of the total laptop price, you're better off spending the money on backup drives or services that minimize downtime in case something does go awry. Of course, you can't put a price tag on peace of mind. There are instances when the logic board or the display—the most expensive pieces of a laptop—fail, and while rare, that can cost you half of what the laptop is worth. Faulty components usually break down during the first year; anything after that is probably your fault.

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Don't lose control of battery usage

If you have recently purchased a new Android smart phone or even if you have been using one for years, one of your main concerns is probably the laptop battery life. With all of the apps available to download, home screen widgets to give you all the information you need at a glance, and even basic functions of the operating system, it’s easy to lose control of your battery usage. Here are a few tips on how to get it back.

First, know what’s causing the problem. In the “about phone” section of the main settings, there is a battery use utility. It displays items and the percentage of the power it used since it was last unplugged. It does not show use from previous battery use so checking this multiple times will help you catch every battery hog. This should be your guide to what battery issues to address first and which tips you can simply ignore.

The biggest culprit is the display. It may look nice when it’s at its brightest but setting it to the lowest acceptable setting is key. There is an automatic brightness feature in the display settings but it’s best to set it manually, or change it as needed with the power control widget. Also, lowering the screen timeout to 15 or 30 seconds, turns off the display when not being used.

Other core functions should be monitored closely as well. Wifi and Bluetooth will search for wireless networks and devices even when your phone is idle, GPS can be used by idle applications to get your location, and sync may be updating your e-mail and other apps more often than you need. These can all be turned on and off using the power control widget as well.

Many apps require data to be transferred in order to keep you updated while on the go. Facebook and Twitter are the most popular, but these along with most others will come set to update very quickly. Most every app will have an option to change how often it updates, and if it doesn’t have that option it might be best to find a different one that does. If the app also comes paired with a widget, it is wise not to use it if you don’t need to. Widgets are constantly active when the home screen is visible, and sometimes even when its not, draining much more power when doing basic tasks like text messaging or switching between apps.

There are also many apps that run idle in the background while you do other tasks, requiring processing power even when not in use. Installing an app like advanced task cleaner or taskiller will allow you to automatically turn off specific applications running in the background after you stop using them, or when you turn your phone off. If you see many apps running that you don’t even use, uninstalling them (Settings/Application settings/Manage applications) is the best solution.

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Batteries can be transported safely

I read with interest and then dismay the article about lithium-ion batteries that asked, "Are these batteries the next threat to flier safety?" The answer is no (Cover story, Money, Aug. 16).

Over the past decade, passengers have brought millions of lithium-ion batteries and millions of portable electronic devices — cellphones, laptop computers, portable DVD players, even medical defibrillators — on board an aircraft without incident. These notebook batteries and products also have been transported by air safely when those shipments complied with existing hazardous materials regulations.

Of the 113 battery "incidents" cited by the Federal Aviation Administration (FAA), more than half did not involve lithium-ion or lithium-metal batteries. Many cases were due to shippers who failed to comply with existing hazardous materials regulations.

There also is a misperception about regulation of products carried onto aircraft by passengers. Hazardous materials regulations in fact do impose carry-on restrictions for small lithium-ion batteries. The regulations state that passengers may carry these batteries or equipment onboard the aircraft only if intended for personal use. The regulations also require each spare battery be individually protected to prevent short circuits. The passenger who brought 58 cellphones, batteries and chargers on the American Airlines flight appeared to be in violation of the rules.

Finally, FAA testing has demonstrated that fire suppression agents installed in transport category aircraft are effective in suppressing a lithium-ion battery fire, and testing by the UK Civil Aviation Authority has confirmed that any fire that might occur in a passenger cabin can readily be controlled.

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Does your laptop's battery keep going and going?

The march forward has been steady enough that it might have gone unnoticed, but the battery life for laptop PCs and other portable devices is getting longer. In the GCN Lab’s May 2007 roundup of laptop PCs, the Dell Latitude D830 lasted the longest in the Lab’s worst-case-scenario battery test, clocking a time of 3 hours, 4 minutes. In this year’s laptop roundup, Apple’s MacBook Pro led the field with a time of 5 hours, 13 minutes.That’s a sign of progress for mobile users, reflecting advances in the development of lower-power systems, for one thing. But it’s not that simple, of course. A lot of factors go into the battery life of a mobile device, including the type of processors, display screens and the batteries themselves – say, whether they are six, eight or nine cells. A laptop manufacturer looking to make a light, highly portable machine might sacrifice battery life for the lighter weight of a smaller battery, for instance.
Nevertheless, if battery life is paramount to you, the length of time

your laptop keeps running outweighs, as it were, those other factors.

And, overall, manufacturers have been making progress. So, how did the

six laptops the Lab recently reviewed stack up in this category?

The Lab tests battery life by running a movie on the hard drive, with

the screen brightness and sound each set to 80 percent, a scenario

designed to put a lot of stress on the battery. Most users -- the ones

not using their PCs as a home theater system substitute -- would find

that their laptops last longer than the time listed here.

The top battery performers from this year’s review:

* Apple MacBook Pro: 5 hours, 13 minutes.
* Lenovo ThinkPad W510: 3 hours, 21 minutes.
* Samsung P580: 2 hours, 33 minutes.
* HP EliteBook 8540w: 2 hours, 10 minutes.
* Sony Vaio EB Series: 2 hours, 2 minutes.
* Fujitsu LifeBook E780: 1 hour, 49 minutes.

The laptops in that review were powerhouse machines, posting high

scores on the PassMark Benchmark tests the Lab uses. But if you need

that much juice, you might opt for a netbook. They're small, light and

inexpensive, but with less powerful processors – though still adequate

for many uses. Netbooks might not have big batteries, but they don’t

really need them.

Battery life times from the Lab’s November 2009 netbook roundup:

* Toshiba Mini NB205-N210: 6 hours, 17 minutes.
* Sony Vaio W-series: 4 hours, 30 minutes.
* Dell Latitude 2100: 4 hours, 28 minutes.
* HP Mini 5101: 4 hours, 5 minutes.
* Fijutsu M2010: 3 hours, 42 minutes.
* Lenovo IdeaPad S10-2: 2 hours, 35 minutes.

If you need power and durability in the field, of course, rugged laptops are the obvious choice. You have to accept extra weight for the power and ruggedization, but you don’t have to trade off notebook battery life, in most cases. Battery times for laptops and convertible tablet PCs from the Lab’s October 2009 rugged roundup:

* Panasonic Toughbook 30: 6 hours, 14 minutes.
* General Dynamics Itronix GD 8000: 4 hours, 45 minutes.
* Getac V100: 2 hours, 6 minutes.

In July 2010, the Lab tested the new Toughbook 31. It lasted 4 hours, 30 minutes in the battery test, but it’s also worth noting that it’s a much more powerful machine than the 30, scoring nearly twice as high on the PassMark Benchmark test.

Short laptop battery life was once the bane of mobile computing, but these days it’s fairly easy to find a device that will at least get you through most domestic flights, or let you work from the back porch. And even longer times could be ahead, considering that the Apple iPad typically get 10 hours from a single charge.

Six things laptops can learn from Apple iPad

Apple sold 3.3 million iPads in Q2, the product’s first quarter on the market. That was more than the number of MacBook laptops (2.5 million) that the company sold in Q2. Plus, the two products combined catapulted Apple from No. 7 in the global notebook market to No. 3.

Meanwhile, all of the other top five notebook vendors saw their growth slow during the same period, suggesting that the iPad cut into their sales. Will these iPad numbers be a short-term bump based on the unparalleled hype and anticipation for the product, or will it be amplified even further during the back-to-school and holiday seasons? That will be one of the most interesting trends to watch during the second half of 2010.
APPLE A1185, MA566 Laptop Battery
Nevertheless, the iPad has already sold enough units to alarm laptop makers and make them contemplate how to react. Nearly all of them are already working on competing tablets, powered by Google Android in most cases.

But, laptop makers should also look at the factors that are triggering the iPad’s popularity and consider how some of those factors could be co-opted into notebooks. Here are the top six:
1. Battery life is a killer feature

When Apple first shared the technical specs of the iPad and claimed 10 hours of battery life, I rolled my eyes. Published battery life numbers rarely hold up in the real world. However, the iPad actually exceeded expectations. I’ve easily milked 11-12 hours of battery life out of the iPad, and others such as Walt Mossberg of The Wall Street Journal have reported the same thing.

This kind of battery performance is huge for business professionals because it untethers them from a charger for an entire business day. Whether it’s for a full day of meetings or a cross-country flight, they can focus on their work without having to worry about finding a place to plug in at some point. I’ve see several business users state that this was their primary incentive for using the iPad.
2. Instant On changes the equation

The fact that you can simply click the iPad’s power button and have it instantly awake from its sleep state and be ready to pull up a Web page, glance at a calendar, or access an email is another major plus. Compare that to dragging your laptop into a conference room, for example. Even the best laptops with Windows, Mac, or Linux take about 30 seconds to boot and then you have to log in and wait some more until the OS is ready.

You don’t always want to fire up your laptop at the beginning of a meeting and leave it on because then you could get distracted or appear as if you’re not paying attention to the other people in the room. But, if something comes up and you want to quickly access your information, then you want it instantaneously so that you don’t have to tell the other people in the room, “Hang on for a second while I pull up that data,” which can break the flow of the conversation and even make you look unprepared.
APPLE MB771 battery

While some laptops can accomplish something similar by quickly going in and out of a sleep state when you flip the lid open or closed, this can regularly cause problems with wireless networking and other basic functionality, and tends not to be as quick as the iPad.
3. Centralize the software

The feature that made the iPad infinitely more useful for lots of different tasks is its massive platform of third party applications, which are all available in a central repository (that’s the key feature) — the Apple App Store . The App Store also serves another valuable function: All updates for iPad apps are handled there as well.

Contrast that with laptops where you can get software preloaded on your compter, buy software shrink-wrapped, or download it from the Internet, and then nearly all of the different programs have their own software updaters. It’s a much more complicated and confusing process for the average user. There’s no reason why a desktop/laptop OS platform can’t have an app store. I recently noted that Ubuntu Linux 10.04 offers a nice step in that direction.
4. Simple interfaces are best

There’s a classic children’s book called Simple Pictures Are Best where a photographer is trying to do a family portrait and the family keeps wanting to try crazy things and add more stuff to the portrait and the photographer keeps repeating time and time again, “Simple pictures are best.”

It’s the same with a user interface. There’s a natural tendency to want to keep trying to toss in more things to satisfy lots of different use cases. But, the more discipline you can maintain, the better the UI will be. Since the iPad runs on Apple’s iOS (smartphone) operating system, it is extremely limited in many ways. However, those limitations also make it self-evident to most users because it requires little to no training. People can just point and tap their way through the apps and menus.

Software makers have been attemtping simplified versions of the traditional OS interface for years, from Microsoft Bob to Windows Media Center to Apple Front Row. None of them have worked very well. The question may be one of OS rather than UI. Could a thin, basic laptop run a smartphone OS? I expect that we’ll see several vendors try it in the year ahead.
5. Most users consume, not create

One of the biggest complaints about the iPad is that it offers a subpar experience for creating content. There’s no denying it, and frankly it’s one of the reasons that I personally don’t use the iPad very much. It’s mostly a reader of books, documents, and files for me, because when I go online I typically do a lot of content creation, from writing articles on TechRepublic to posting photos on Flickr to posting tech news updates on Twitter.

However, I’m not the average user. Even with the spread of social networking, which is much more interactive, the 90-9-1 principle still applies across most of the Web. That means only 1% of users are actual content creators, while 9% are commenters and modifiers, and the remaining 90% are simply readers or consumers. The iPad is a great device for content consumers. But, it’s not very good for the creators and modifiers, who are both strong candidates to stick with today’s laptop form factors, which are perfect for people who type a lot and manipulate content.

That leaves a huge market that could be easy pickings for the iPad. As a result, vendors need to think about ways to make laptops better content consumption devices.
6. Size matters

Being able to carry the iPad without a laptop bag is another huge plus. The power adapter is even small enough to roll up and put in a pocket, a jacket, or a purse. The diminutive size of the iPad can make business professionals feel as if they are traveling very light, especially if they’re used to lugging a laptop bag that included the laptop and a bunch of accessories to support it. On a plane, working with the iPad on a tray table is a much more roomy experience than trying to use most laptops.

The lightweight nature of the iPad can also make it more likely that professionals will carry it into a conference room or into someone else’s office to show a document or a Web page, for example.

APPLE A1175 Battery

There are plenty of ultraportable laptops on the market from virtually every vendor, but these tend to be specialty machines and are often higher priced. In light of the iPad’s success, vendors might want to rethink their ultraportable strategy by looking to make these devices smaller, less expensive, and better on battery life. They may also consider experimenting with a mobile OS such as Android on some of these devices.

ASUS will use Boston-Power's batteries in laptop line

Boston-Power Inc.'s lithium ion Sonata battery is being used to power a new line of notebook computers, the Westborough company said today.

The Series B line from ASUS International, a $7.5 billion company which sells portable computers that run on the Microsoft Windows operating system, will start shipping this month with the long-lasting Sonata battery, according to a press release from Boston-Power. The company's batteries, which are said to last three times longer than a typical laptop battery pack, already are used in Hewlett-Packard computers.

Calling ASUS's use of the Sonata a "tremendous endorsement," Boston-Power's vice president of marketing, Sally Bament, touted the battery's so-called green attributes.

"Users are seeking dependable high-performance, safe and environmentally sustainable batteries," Bament said in a press release. "Boston power has established a
global reputation for leadership in delivering those solutions."

Rudy Magna, director of sales at ASUS Computer International, said his company decided to use the Sonata, in part because of its environmentally-friendly qualities.

"Our customers look to ASUS to provide cost effective solutions that include innovative features such as the Sonata Long Life battery, which offers not only long-term dependability but is also environmentally friendly," Magna said.

Asus B Series Boasts Boston-Power Sonata Long Life Battery

Asus is offering anew range of laptops, the B Series which is intended for business use. The models included in this range are the B53J, B53F, B43J and the B43F. The B53 models are available with 15.6-inch displays while the 43 models come with a 14.1-inch display. There are also two choices of processors available and these are the Core i5 and the Core i7. The chosen processor will be paired with an ATI Radeon 5470 discrete graphics. They will also be available with either 2GB or 4GB of RAM. There are various storage capacities available that customers can choose from.

Some of you might be saying to yourself, is there anything unique to the B Series. As a matter of fact there is! This latest Asus offering makes use of Boston-Power Sonata Long Life laptop Battery. This lithium-ion battery is capable of retaining its charging capacity even after a long time of use. This battery boasts “triple the lifespan of typical notebook batteries.”

One of the problems that laptop users have is the diminished battery capability over time. This news regarding the B Series battery is definitely very welcome news. If I’ll be replacing my laptop in the near future, I’ll definitely go for Asus’ B Series laptops!

How to remove the battery from a Dell Latitude D610 laptop

Sometimes a laptop battery goes bad and you need to replace it. Or maybe you've upgraded to a better, longer-lasting battery and you need to install it. Or maybe you just want to take the battery out to put it in the freezer for a while. Whatever the reason, if you need to remove the battery from a Dell Latitude D610 laptop, here's how:

First, turn off the computer. Shut it down completely - don't just hibernate it or put it into sleep mode. Disconnect it from any external power source as well, such as an AC adapter or car charger.


Next, flip the computer over so you're looking at the bottom. (Make sure the laptop is closed before flipping it over.) The battery is located in the lower left corner (diagonally opposite from the fan vent). There is one tiny Phillips head screw securing the battery in place; remove this screw, but do not lose it. Once the screw is out, just push in the tab with the arrow on it (on the right side of the battery) and pull up (away from the laptop), and the battery should pop right out. If you don't push the tab in all the way, the battery won't pop out.

Be careful with the battery - don't drop it, put it in the oven, or throw it at anyone (even if it's someone you don't like). If you plan to use the laptop without the battery in it, either for troubleshooting purposes or to save battery life, be careful when moving the laptop, because jostling it even slightly could dislodge the power cord and cause the computer to shut down.

When reinstalling the battery (or installing a new battery) just slide it in toward the left side, and once it's in the tab should snap into place. Make sure you put the screw back in - all it takes is for something to knock against that tab and the battery will fall right out.

Over time, the battery's life and performance will start to degrade. If you need to purchase a new D610 battery, there are many websites that sell them - just search Yahoo! or Google for "dell d610 battery." Be sure to read the description before purchasing a battery online; some are rated for longer life than others.

How to increase the life of a laptop's battery

As a self pronounced computer geek, I have a laptop, and when I first got it, I didn't fully understand how the computer used the laptop battery power, so after looking into it, I have come up with a various amount of ways to improve the overall lifespan of your laptops battery.

1. Unplug any unused peripheral devices. These may be external hard drives, flash drives, or a web cam. Basically, if you have anything your not using in any of your USB ports, unplug it, as it takes up battery even if not in use.

2. If you can, dim your screen. All laptops, or at least ones that I've seen, carry a function where you can dim the back light on your screen. Lower the light, lower the amount of electricity it uses.

3. If your not using the your WiFi, turn off the card. This is another feature that many laptops have. Its function is to disable the WiFi card in your laptop, making it use less battery. For my laptop, I press [Function] + F2.

4. Try not to use the disc drive. The disc drive is often times the most energy consuming piece of hardware in your computer when its being used, due to it spinning the entire time your using it.

5. Don't keep your laptop on for extended periods of time. Even if its plugged in, the battery is still giving off charge, slowly decomposing the amount of electricity it can store.

6. Avoid using a large of amount of programs. This builds up the CPU's "stress" and requires it to use an excess amount of electricity.

7. Keep it clean! Defrag your computer and remove unnecessary files! This makes it so the hard drive doesn't have to do nearly as much work searching and using your files.

8. Keep your laptop cold. When computers overheat, its not only bad for the components in the laptop itself, but its pretty rough on the battery also.

9. When leaving your laptop on, at least hibernate it. And no, that doesn't man lock the desktop or put it on standby. I mean hibernate. Any of the other choices, and your computer is still using up quite a bit of battery.

10. Adjust your power properties. On all the laptops I've dealt with, there is an option, often times wherever you see you notebook battery life meter, where you can adjust the amount of time that is require before your laptop begins its screen saver, stand by, or hibernate.

I leave these wise words of battery advice to you, and hope that this article helped in some way, either to you or a friend.

How to choose a battery for your laptop

Having a good laptop battery is very important as to take full advantage of the laptop portability. Without a good battery you will loose that advantage and always have to plug the laptop into the wall. Most laptop batteries last from about to three to five hours depending on how many programs you run on a laptop or how long you use your laptop. If your battery has stopped to fully recharge or for some reason stops to hold its charge and you have to plug it in frequently, it probably means that you have to get a new battery.


Let's take things step by step there are certain things to consider before deciding on which battery to buy. First of all you need to the make of your laptop and its model number. If you don't know this information you can open up your laptop battery compartment while its off and unplugged of course. This is necessary because each laptop is designed to use only one certain type of batteries. Then second of all you need to decide whether you use your laptop on a regular or you use it occasionally because if that is the case you can get a way with getting a standard battery.


There is always the issue of whether to buy a used or a new battery. Well new is always better but if you don't use your laptop that often you may get an old battery. Always remember that before buying a battery it must have a warranty for at least a year. That is because poor quality batteries usually stop working after a minimum of three month.


The next thing you should look for is the type of battery. There are four main types they are Ni-Cad, Ni-MH, Li-Ion, and Li-Poly. Ni-Cad laptop batteries are really old which is why not a lot of manufacturers still make them. Ni-MH is newer and more advanced, but is not as good as its Li-Ion and Li-Poly counterparts. The Ni-MH batteries weigh more than the other two, but it produces less current than the rest of them. Li-Ion and Li-Poly are the most advanced types of batteries there is which is why you should try to get one of these two types if possible. Most laptops but not all laptops that come with one type of battery can not use any other type of battery i.e. if your laptop came with a Ni-Cad, it must be replaced by another Ni-Cad.


Now that you have seceded on which battery to buy you have one more thing to check first, the power rating. In the case of laptop battery they are rated be volts and mill amperes as they are really small in size. You should always go for the one which has the most mill amperes. Another way of rating a battery is to determine its Watt per hour. This is done by multiplying the number of volts with the number of amperes.


Whatever type of battery you decide to buy its important to keep good maintenance of these batteries. It always a good idea to try to drain out the whole battery supply before charges to maintain a life for your battery.

How to calibrate a laptop battery

Laptops are nice, but their batteries never seem to last long enough. Even with recent technological improvements, laptop batteries seem to run out at the most critical and inconvenient times. Laptop batteries are also pretty expensive; so many users can’t afford the luxury of purchasing backups. Vehicle adapters are similarly expensive and oftentimes there is no accessible power outlet to plug in the laptop’s AC adapter. Besides, the beauty of having a laptop is that it can be used anywhere, right?


With repeated charging cycles (especially when the cycles are short) the laptop batteries lose sync with the battery power meter inside Windows. This often leads Windows to misrepresent the amount of power remaining. By calibrating your laptop battery, you can make sure you get maximum battery life and the most accurate representation of battery life from Windows.

Most people probably never calibrate their laptop’s battery even though major manufactures such as Hewlett Packard (HP) recommend that laptop batteries be calibrated once every three months. Although you should check with the manufacture of your notebook for specific calibration advice, the procedure listed here can help.



1. Disable Windows power management. You can access the power management settings by right clicking on the battery icon in your system tray, through Control Panel, or through the system screen saver menu when you right-click on the Windows desktop. The settings are similar and accessible in similar ways across all recent Windows versions. Visit support.microsoft.com to get more help with this if you’re unable to do this yourself.

Once you access Windows’ power management settings, take note of the current settings and then select the “Always On” profile and choose “Never” for all the power scheme’s options. Be sure to save these settings.

2. Charge the battery to 100% capacity. This is done by plugging in the laptop’s AC adapter and connecting it to the laptop. Check the battery meter in the system tray to make sure the battery is fully charged before proceeding.

3. Drain the battery. Disconnect the AC adapter from the laptop computer and allow the computer to run until it automatically shuts off.

4. Recharge the battery. Plug in the laptop’s AC adapter and connecting it to the laptop.

5. Reset Windows power settings. Go back into the Windows power management settings and set the power scheme back to its original settings. Usually, laptops are set for “Portable/Laptop.” Be sure to save these settings else, your system will run through battery power too quickly.

Once these steps are completed, your battery should be completed.

Buy a Cheap Laptop Battery

Computer batteries including laptop batteries come with specifications that state what amount of voltage they might be having and also the milliamp rating hour. The reason why you should care about what the abbreviations mean is because they are not hard to understand and they are important because they state how your cheap compact laptop battery operates.

For example, Volts- or V- indicates the potential energy measurement or it can also be explained as the electrons applying pressure on the battery of the laptop that is being used either as the negative terminals try to move the positive terminal or the other way round.

As for the Amp-or Ah-, this is the measurement of capacity where by the measurement is used to determine how long a cheap compact laptop battery can be able to last and how well it can deliver. The Amp hour on the other hand does not specify or indicate the electron flow at any given time.

For example a notebook battery can deliver about 0.5 Amp in duration of about two hours. In order to get a good over view of how much the laptop battery you have bought can deliver and last in terms of power, you can ask the dealer or go to the internet where the information is not hard to come by.

Depending on the screen size, the model, the floppy drive, processor speed, the usage of CDs and other factors, you can be able to know the time limit that the battery can be able to run your laptop.

It is common to see some laptop batteries with high voltage indicated on them while that does not make any impact on the performance of the laptop. This can mostly be seen on external universal batteries.

One thing that is very strange is the way some people are always ready to buy refurbished second hand batteries that do not even come with any guarantee while they can be able to get brand new batteries that come with warranty at a reasonable price.

When a person goes out to buy cheap Compaq laptop batteries, they should beer in mind that cheap laptop batteries that have been refurbished do not exist.

Although a laptop battery can be refurbished, it is not worth to buy it because the cost of refurbishing it is more than the cost of a brand new laptop battery.

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How to Increase Cell Phone Battery Performance

With current cell phone technology your cell phone battery life can be drained far sooner than what the manufacture may suggest. Large touch screens, fast processor and numerous subsystems running in the background together team up to drain down your battery. You can either deal with recharging the battery every chance you get or take some steps to reduce the battery consumption in your phone.

Battery Management

Go into your cell phones settings and find the Battery manager option. This option gives you the ability to set your phones settings to adjust for either high performance or energy saving mode. The options and wording may vary with different manufactures but the results are similar. The Battery Manager is a function that can shut down devices and apps that are not currently in use so that energy consumption is reduced.

Manual Battery Management

There are several manual steps a user can take to save battery life on a cell phone. Manual battery management is permanent in a way that it doesn't rely on whether or not if your phone is active or on standby. Once the options are changed manually they can only be returned to previously settings manually. Here are a few steps to manually control battery management.

Turn down screen brightness

Go into your settings and turn down the brightness of your LCD screen to a level that's comfortable to you. The lower the level then the more energy you save.

Screen Time Out

Change your screen time out setting to its lowest amount of time. This way your screen will shut off as soon as you stop using your phone.

Turn off Wi-Fi

Most of the time you're not using your Wi-Fi feature so why leave it running? Turning off your Wi-Fi will save you energy that's normally just being wasted. You can always turn it back on if you need it.

Turn off Bluetooth

If you're not using a Bluetooth head set then this is another waist of energy. These types of wireless features are constantly running in the background even though you may not be aware of them being on.

Instant insight: Searching for better batteries

Escalating global energy demand along with the limited supply of fossil fuels and mandates to minimise CO₂ emissions has increased demand for alternative energy sources. Li-ion batteries have played a key role competing with Ni-MH batteries to supply power for small electronics since Sony launched the first generation Li-ion battery in the early 1990s. Recently, Li-ion batteries have predominantly provided the electrical power necessary to operate small portable electronic devices such as cellular phones, laptop computers, and camcorders. In addition, they have been used in both hybrid electric vehicles (HEVs) and back-up electricity storage units for renewable energy sources which require a large unit.

In 2008, sales of rechargeable Li-ion batteries reached 10 billion dollars and are currently growing at nearly 10 per cent per year. Furthermore sales are expected to grow dramatically if Li-ion batteries can be successfully implemented in HEVs or plug-in electric vehicles (PEVs).

A Li-ion battery is mainly composed of a carbonaceous anode (generally graphite), a carbonate-based organic electrolyte with a Li-containing salt (e.g. LiPF₆), and a Li metal oxide cathode (generally LiCoO₂). Li ions are inserted between graphite and LiCoO₂ through the electrolyte during charge and discharge, respectively. Since the demand for safe Li-ion batteries exhibiting high power, large capacity, and high rate capability is ever increasing, research has been carried out worldwide to find new electrode materials to replace the currently used materials.

Li metal can electrochemically alloy and de-alloy with other metals at room temperature in an organic electrolyte electrochemical cell. Li-alloying reactions with metallic or semi-metallic elements and various compounds have been investigated during the past few decades. Although these alloying materials provide a larger specific capacity than graphite, except for a few transition metal oxides, they generally suffer from a large irreversible capacity at the first cycle and poor cycling behavior due to a large volume change during cycling.

If the microstructure of the electrode materials can be designed properly, the volume change during lithiation and delithiation would be compromised to some extent. In 1997, Fuji announced its Stalion battery, which employed an amorphous tin composite oxide (TCO) anode, but it was not commercialised because of its large irreversible capacity during the first cycle. Since then, Sony developed its Nexelion battery in 2005 using an anode material mainly composed of a Sn/Co/C composite with Ti metal synthesised by a high energy mechanical milling process. Not only composite materials, but also nanosized particles and nanostructured materials have also been suggested to alleviate the mechanical strain generated due to the volume change as the Li ions are inserted to and extracted from the host electrode materials.

A number of scientists have examined alloy-based anodes, in particular, focusing on the Group IV and Group V elements and their composites for Li-ion batteries. Research on Group IV elements has been performed using several material concepts based on nano-architecturing of materials, active/inactive composite, intermetallic compound, and the use of carbonaceous material as a matrix phase. Group V elements-based intermetallics can lead to interesting crystalline structures that enable new concepts for anode materials, such as topotactic reaction, quasi-intercalation reaction and other interesting insertion and conversion reactions, to be designed.

Although research on the alloy-based anode materials for Li-ion battery has a long history since 1971, a breakthrough is required to bring out their full potential for Li-ion battery. Development for alloy-based anodes will remain a highly competitive field providing us with an excellent and fascinating energy source.

iPhone 4 and iOS 4 battery drain

iPhone 4 owners and those that have upgraded their older iPhones to iOS 4 have noticed that battery life is suffering. We take a look under the covers to find the problem.
One of the big features that Apple has delivered with iOS 4, that was requested by users, was multi-tasking - applications continue to run in the background even when you’ve returned to the home-screen or another application. Here’s an example of how it works.

If you’re running a sat-nav and then decide to go to the browser to look something up, the sat-nav app continues to run in the background, tracking your movement and updating its route information. With any application that uses Location Services, it’s easy to see this running as there’s a small indicator near the battery meter at the top of the screen.

However, other applications are more insidious. For example, we were running an IM client, Yahoo Messenger, and found that it was running in the background, churning up CPU cycles. An easy way to check which applications are running under iOS 4 is to double-press the main button. That opens a small tray of your running applications.

This list scrolls across with a finger swipe and shows which applications are currently active on the iPhone. Based on our observations and use, it’s easy to end up with over a dozen apps all sitting there, either working or waiting for some further input from you.

If you want to really shut down an app, a tap-hold on the open application icon will reveal a small minus sign in the top-left corner of the icon. Tapping that will close the application down.

All of this has us recalling the early days of Windows CE and Windows Mobile. In those days, tapping the cross in the top-right corner of an app didn’t shut it down but sent it into the background. Over time, the device ground to a halt as system memory was consumed by applications that didn’t release memory correctly.

With iOS 4, the same sort of behaviour is manifesting itself although it seems that the presenting symptom is battery drain rather than memory. In our testing, we found that an iPhone 4 could run down in just four hours. The culprit in our case was a sat-nav application that kept the GPS chip busy even though the application wasn’t in the foreground.

We were also caught out by applications that automatically launched after a restart. We rebooted our iPhone 4 and found that applications that had been active restarted after the reboot. For example, Skype, Fring and Yahoo! Messenger all started automatically and logged in. There doesn’t seem to be an easy way to alter that behaviour.

There are a couple of things iOS 4 users can do. Firstly, after using your iPhone for a while, take a look at the apps that are currently running by double-pressing the main button. Shut down any unneeded apps by tap-holding the redundant applications and closing them down but tapping the red minus button on the icon.

Keep an eye on applications that use Location Services. For example, we use the SpeedTest application. It uses the GPS to determine where you are for testing. If you go back to the home-screen before the test finishes, the GPS remains active and eats away at the charge level.

Another handy app to install is the $0.99 iStat. This gives you a snapshot of everything that’s running on your iPhone, using up system memory and CPU cycles.

iOS 4’s multitasking is a boon although it does come at a cost. Application developers are going to have to get smarter and rework applications so that they don’t hog the battery in the background. Until that happens, users need to be vigilant and make sure that unwanted apps aren’t running in the background.

Ways to make your cell phone battery last longer

Cell phone batteries can be a giant problem for people and sadly the batteries never seen to last long enough. After using them for a few months the batteries often start to die incredibly quickly and rather more often than you may feel they should. Though there is no way to get the performance and life span of the early days back, you can use your phone, it's settings and the way you use it to substantially increase the time between needing to charge it. Remember each time it gets charged it damaged to battery little by little, for a few charges the damage isn't recognisable but over a long period it's massive.
Firstly modifying the settings on you're phone, for this the exact details and settings are all from the Sony Ericsson C902, but most modern phones will have similar options for you to change. First turn the brightness to the lowest setting the phone has (in this case 50%) the phones screen is still very visible though the power needed is much less, meaning the battery will last longer. Along with this are other display settings, for the background you should settle on a blank or “none” setting, as it uses less processing power than an intricate and clever pattern or a picture of you and your partner. This may seem a bit “dull” but when it comes to getting the most out of the battery life this is a great step in the right direction.

It's not only the lighting settings but the sound settings that can effect the battery life. Firstly put the phone onto mute, the sound needed to play your ring tune adds up over time, especially if you're phone is one that's constantly getting messages. Though what you should also do is actually turn the vibrate off as well as the vibrations use up some of the battery life, though it's not a lot, when you're wanting every drip of juice it adds up.

Staying with the settings, the biggest drains of the battery are what some phones call “Connectivity” options, things such as Bluetooth, 3G, Wi-Fi. Turn each of these off as they quickly sink their teeth into the battery and should only be turned on when needed. In the case of the C902 the phone can still surf online (using GPRS) with 3G turned off, rather than wasting battery life searching for a 3G signal constantly even when you're not wanting to be connected to the net.

Now with all your settings altered you should notice longer life, though there's more to it than just a few quick settings. Most modern phone users will use some programs or applications, be it to surf the internet (such as the Opera browser), play games or even gamble, though many users will also leave them running in the background. Leaving programs, such as those that are java based running can substantially cut the battery life, those that use both the internet and java therefore deliver a double whammy. If you're done using them close them, don't just leave them in the background where they are nibbling on your battery life.

Finally, if you're not expecting calls, texts or anything, turn your phone off. It may seem rather obvious to some, and incredibly backwards to others but it's only really using battery whilst it's on (though leaving it off for long enough will drain it) so turn it off until you need to need to call someone or text them.

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