The VGP-BPS21A VAIO Standard Capacity Battery from Sony is a standard capacity battery for the VAIO F, Y, CW, NW, SR, B, and S. The battery is identical to the one that ships with the computer, providing the same runtime.
Get a spare to extend the battery life of your VAIO when you're on the go traveling or for use in lengthy meetings and classes
Please refer to your notebook spec sheet for approximate battery ranges for your VAIO notebook
Compatible with VAIO F, Y, CW, NW, SR, B, and S