Premium Power Products compatible laptop battery for IBM Thinkpad A20, Thinkpad A series. Also works with A20M, A20P, A21, A21M, A21P, A22M, A22P. Fits with compatible part numbers: 02K6619, 02K6617, 02K6614, 02K6640, 02K6618, or 02K6616. This will fit the following TYPE: 2628-ANY, 2629-ANY, 2652-ANY or 2653-ANY. "ANY" is a substitute for any numbers.