Replacement Laptop Battery for SONY VAIO VGN-CS28/Q, VGN-FW100, VGN-FW148J/H, 1. Voltage: 11.10V 2. Capacity: 4400mAh Replacement Laptop Battery for SONY VAIO VGN-CS28/Q, VGN-FW100, VGN-FW148J/HSeries Compatible Part Numbers: VGP-BPS13/S, VGP-BPS13A/S, VGP-BPS13AS, VGP-BPS13B/S, SONY VAIO VGN-CS28/Q, VGN-FW100, VGN-FW148J/H, SONY VAIO VGN-CS28/Q, VGN-FW100, VGN-FW148J/H, VGP-BPS13S VGN-FW19/B, ...