High-Performance Replacement Battery for Lenovo ThinkPad Business Series Maximize your Lenovo ThinkPad's productivity with this premium 58Wh Li-ion replacement battery. Specifically engineered for multiple ThinkPad T, X, L, W, and P series models, this high-capacity battery delivers extended runtime and reliable performance for demanding business applications. Fully compatible with part numbers 0C52862, 0C52861, and 45N1124-45N1129 series.