DR. BATTERY Replacement Battery for Lenovo ThinkPad L440 / L540 — Fits L440 20A, 20AS, 20AS000SUS, 20AT0021US, 20AT0030; Compatible with 0C52863, 0C52864, 45N1145, 45N1147, 45N1148, 45N1149

DR. BATTERY replacement designed for Lenovo ThinkPad L440 and L540 laptops. This unit is compatible with L440 variants including L440 20A, L440 20AS, L440 20AS000SUS, L440 20AT0021US and L440 20AT0030. It also replaces the following part numbers: 0C52863, 0C52864, 45N1145, 45N1147, 45N1148 and 45N1149. Ideal as a direct-fit replacement for restoring your ThinkPad's battery performance while maintaining compatibility with the listed models and part numbers.