IBM 92P0998 Battery 14.4 V 4400 mah Li-Ion, Compatible with Battery Model No. IBM - 92P0998, 92P0999, 92P1000, 92P1002, 92P1003, 92P1005, 92P1009, 92P1080, 92P1119 Suitable for use with Model No. IBM - Thinkpad Models: X40, X41 LCB221