IBM notebook battery Designed for: ThinkPad T40 / ThinkPad T40p / ThinkPad T41 / ThinkPad T41p / ThinkPad T42 / ThinkPad T42p / ThinkPad T43 / ThinkPad R50 / ThinkPad R50e / ThinkPad R50p / ThinkPad R51 / ThinkPad R51e / ThinkPad R51p / ThinkPad R52 / ThinkPad R52p Colour: - Compatibility: IBM Material: Li-Ion Capacity: 5000 mAh Voltage: 11.1 V