Brand new battery for IBM Thinkpad T20/T21/T22/T23 series(not original). Li-ion akku 10.8Volts 4400mAh Compatible with these models: ThinkPad T20/T21/T22/T23/T24 Series Compatible Parts Number: 02K6620, 02K6621, 02K6626, 02K6627, 02K6649 ,02K6649 02K7032,02K7028,08K8026 02K6626,02K7030 Voltage: 10.8V Capacity: 4400 MAh Battery Cell : 6 Cells Size: 14.2cm* 8.5cm*2.2cm Replace FRU 02K6649.02K6626.02K6627