BattPit 10.8V 4400mAh (48Wh) Replacement Battery for Lenovo ThinkPad W550s — Compatible with 20E1001BUS, 45N1124, 121500148, 45N1127, 45N1134, 45N1137

Brand new Li-ion replacement battery engineered for the Lenovo ThinkPad W550s. 10.8 Volt 4400mAh 48Wh capacity using Grade A Cells for dependable runtime and long-term stability. Ideal swap for models/part numbers 20E1001BUS, 45N1124, 121500148, 45N1127, 45N1134, and 45N1137. Includes a 1 Year Warranty and a 30 Day Money Back Guarantee.