This is a Brand New Replacement Battery for IBMLithium Ion System Battery is a rechargeable battery that supports the ThinkPad A20, A21, A22, series Notebooks. Compatible ThinkPad Models: ThinkPad A20: A20 Series, A20M, A20P. ThinkPad A21: A21 Series, A21M, A21P. ThinkPad A22: A22 Series, A22M, A22P. Replaces IBM part #s 02K6612 ,02K6614, 02K6615, 02K6616, 02K6617, 02K6618, 02K6619, 02K6640, 02K6644, 02K6645, 02K6720, 02K6767, 02K6769, 02K6770, 08K8025, FRU02K6619, FRU02K6644, IBM IB-A/L. Product Specifications: Rating 10.8V Capacity: 4400mAh Size: 10.60" x 2.50" x 0.90" Color: Black Technology: Lit-Ion Condition: Brand New