product code: IBM X20
Voltage: 10.8V
Capacity: 4400mAh
Dimension: 208.80 x 50.84 x 19.50 mm
Colour:  Black
Weight:  325g
Battery Type:  Li-ion

Replace P/N: 02K6651, 02K6679, 02K6710, 02K6758,
02K6759, 02K6760, 02K6761, 02K6845, 
02K6846, 02K6852, 02K6854, 08K8024, FRU 02K6653

Fit model:  IBM ThinkPad X20, X21, X22, X23, X24 Laptop Battery