... Approved 3.2V 600mAh 14500 LiFePO4 Rechargeable Battery, LiFePO4 Battery for Power Tool, Electric Toy, EV Batteries Cylindrical 14500 LiFePO4 Rechargeable Battery with UL 3.2V ... 4. Installed IC chip will prevent the battery pack from over charge and over discharge, it helps ... ---2C fast charge within half hour10. Perfect for building up battery pack for medical equipment Back-up or EPS Emergency Power ...