NinjaBatt Laptop Battery for Sony Vaio VGP-BPS13S VGP-BPS21A VGP-BPS13/Q VGP-BPS13 VGP-BPS13B/Q VGP-BPL13 VPCCW21FX VGN-AW VGP-BPS13/S VGP-BPS13Q VGP-BPS13/B - High Performance [6 Cells/4400mAh/49Wh]