This is a brand new Sony Vaio CR490EBL battery. This CR490EBL 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.

Each battery is individually tested before shipment and backed by 30 day complete satisfaction guarantee and a 2 Year warranty.

You can expect about 2 hours to 2-1/2 hours of run time with this CR490EBL 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 laptop (our SON-BPL9-B). The higher capacity battery cells inside this cartridge have an energy capacity of 5200 mAh. This battery will be compatible with batteries rated at 4400 & 4800 mAh capacities while providing up to 20% more run time.