DR. BATTERY Replacement Battery for Lenovo ThinkPad T420s — Fits 4174 28U / 4174 29U / 4174 2AU / 4174 2BU / 4174 L8U; Compatible with 0A36287, 0A36309, 42T4844, 42T4845, 42T4846

DR. BATTERY replacement pack made for Lenovo ThinkPad T420s laptops. Compatible with the T420s variants 4174 28U, 4174 29U, 4174 2AU, 4174 2BU and 4174 L8U. This unit also replaces Lenovo part numbers 0A36287, 0A36309, 42T4844, 42T4845 and 42T4846. Designed as a direct-fit substitute for the original battery to restore runtime and ensure correct installation. Please check the model or part number on your laptop to confirm compatibility before purchasing.