The VGP-BPL21 VAIO Large Capacity Battery from Sony is a large capacity battery for select Sony VAIO notebooks. It delivers 1.5 times the capacity of a standard battery, increasing runtime by 50%. The battery is compatible with the VAIO F, NW, CW, Y, S, B, and SR.
Extend the life of your battery 1.5x longer than the standard capacity battery
A large capacity battery can help you get through lengthy meetings, work sessions, or long flights
Please refer to your notebook spec sheet for approximate battery ranges for your VAIO notebook