Sony VGP-BPS13 battery specs:
Type: Li-ion
Capacity: 4400 mAh
 Voltage: 11.1V
Size: 00 x 00x 00 mm
Color: Black
Sony VGP-BPS13 battery Compatible original Battery Code:
 VGP-BPS13
 VGP-BPS13/B
 VGP-BPS13/S
 VGP-BPS13A/B
        VGP-BPS13B/B
Sony VGP-BPS13 battery Fit with below:
 VGN-FW11
 VGN-FW11M
 VGN-FW11S
        VGN-FW139E/H
 VGN-FW15T
 VGN-FW17/B
 VGN-FW17T/H
 VGN-FW17W
 VGN-FW19