This is a 4 cell Brand New REPLACEMENT Battery for IBM. Replacement Battery is designed for use with Lenovo ThinkPad X40 and X41 notebooks. Compatible ThinkPad Models: Lenovo ThinkPad X : X40, X41. Replaces IBM part #s: 92P0999, 92P1000, 92P1001, 92P1002, 92P1003, 92P1005, 92P1009, 92P1080, 92P1119, 92P1146, 92P1148, 92P0998, 92P1143, 92P1145, 92P1147, 92P1149, 92P1078, Product Specifications: Rating 14.4V Capacity: 1900 mAh mAh Color: Black Size: 8.19" x 1.84" x 0.49" Technology: Lit-Ion Condition: Brand New