Toshiba PA2437U battery by Amstron is designed for use with the TOSHIBA T2100 Series/ Satellite 100CS laptop models. Amstron laptop batteries are precision-engineered and rigorously tested for voltage, capacity, compatibility and safety to exceed original equipment manufacturer specifications. • 12.0V 4000mAh Capacity • Nickel Metal Hydride • Replaces Toshiba Battery P/N PA2435, PA2435U, PA2435UR, PA2437, PA2437U, PA2437UR, PA2437URA, PA2439, PA2439U, PA2439UR, PA2439URA • Full 1 year warranty