BattPit Replacement Li-ion Battery for Lenovo ThinkPad W550s (20E10005US / 0C52862 / 121500147 / 45N1126 / 45N1129 / 45N1136) - 10.8V 4400mAh (48Wh)

Replacement battery compatible with Lenovo ThinkPad W550s — fits part numbers 20E10005US, 0C52862, 121500147, 45N1126, 45N1129 and 45N1136. Brand new Li‑ion pack rated at 10.8 Volt and 4400mAh (48Wh) capacity, built with Grade A cells for consistent performance. Designed as a direct swap for the original battery to restore runtime and reliable operation. Backed by a 1 Year Warranty and a 30 Day Money Back Guarantee.