This is a brand new 9 cell extended run battery. This replacement battery comes with a CD and DOES require a BIOS update. The CD version of this battery is compatible with Windows XP, Vista, and Windows 7. However if you upgraded your operating system from an earlier version it may not work. If this is the case with your laptop please go to our Sony battery that does not require a BIOS update. The added battery capacity resides in a larger cartridge which will protrude to the rear of the laptop about 1 inch. The additional capacity will power the laptop an extra 1-2 hours over the standard 6 cell battery. You can expect 3-4 hours of run time with this battery. Sony laptops are noted for their brilliant and bright displays. However, this is also the main drain on the laptop battery in your Sony computer. By dimming your computer screen's brightness, you can achieve much longer battery run times.

The superior Samsung lithium-ion cells inside the battery cartridge will provide longer run times between charges as well as a longer service life than cheaper batteries. In addition, Lithium-ion batteries are not subject to the memory effect common with older battery technology. This means you can recharge your laptop any time without diminishing your battery capacity. This laptop battery replacement is typically superior to the original battery and is 100% compatible with your Sony Vaio notebook computer.

You can expect about 3 hours to 4 hours of run time with this computer battery when new, depending on your energy use. If you are looking for the standard 6 cell battery, see our (VGP-BPS13). A CD ships with this battery which provides the latest power management updates for your Sony laptop. This battery is compatible with all operating system software platforms including 64 bit laptops running windows 7, Windows XP & Windows Vista.

This battery replaces the Sony Vaio VGN-CS, VGN-FW series laptop batteries and additional machines which are listed at the extreme bottom of this web page.

Laptop Battery Express only deals with brand new premium computer batteries. We never carry recycled or used batteries. The battery is individually tested before shipment and backed by 30 day complete satisfaction guarantee and a 2 Year warranty. We only use the highest quality cells inside the battery pack so you will have a long service life (300-500 recharge cycles). We do not use cheaper battery cells which can wear out in a little as 6 months. Our inventory turns rapidly and you will always receive a freshly manufactured battery.