This is a brand new Sony Vaio premium grade replacement 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 superior South Korean cells inside the battery cartridge will provide longer run times between charges as well as a longer service life than cheaper batteries. In addition, Li-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 even longer battery run times, check out our extended run battery for your Sony Vaio laptop (our SON-BPS13).The added capacity is contained in a larger cartridge which will protrude to the bottom of the laptop. The battery pack contains rubber feet on the bottom of the battery pack to support your laptop. The battery will raise the rear of your keyboard about 1 inch, tilting your keyboard forward similar to a desktop keyboard. A CD ships with this battery which provides the latest power management updates for your Sony laptop. This battery is not compatible with 64 bit laptops running windows 7. The battery will work with Windows 7 users who have 32 bit laptops. This battery works with all other windows operating systems , including 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.