Compatible IBM Laptop Battery, Replaces Part Number 02K7054, 02K6928, 02K7052, 02K7054-ER, 02K7055, 02K7057, 08K8218, CL734B.081. Fits Models: IBM ThinkPad R32, ThinkPad R40, ThinkPad R40, ThinkPad R40, ThinkPad R40, ThinkPad R40, ThinkPad R40, ThinkPad R40, ThinkPad R40, ThinkPad R40, ThinkPad R40, ThinkPad R40, ThinkPad R40, ThinkPad R40, ThinkPad R40, ThinkPad R40 Series