Get longer battery life with a brand new Sony Vaio VGP-BPL21 replacement battery. This battery replaces the original battery part number VGP-BPL21 for the Vaio VGN-CS and VGN-FW laptop models. Additional compatible laptop models and battery part numbers are listed below.

This battery DOES NOT require a BIOS update or CD to be recognized by your Sony power software. This battery will require your laptop to be restarted before it starts charging.

This battery can last up to 4 hours on a single charge, depending on energy usage. 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. 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.

We use the highest quality lithium-ion battery cells that 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.