Compatible Model Number:
IBM ThinkPad A20 Series
ThinkPad A20, ThinkPad A20M, ThinkPad A20P
IBM ThinkPad A21 Series
ThinkPad A21, ThinkPad A21M, ThinkPad A21P
IBM ThinkPad A21e-2628 Series
(not include ThinkPad A21e - 2655 Series)
IBM ThinkPad A21e-2632 Series
(not include ThinkPad A21e - 2655 Series)
IBM ThinkPad A22 Series
ThinkPad A22, ThinkPad A22M, ThinkPad A22