... High Capacity 3.2V 1500mAh 18650 Rechargeable LiFePO4 Battery, LiFePO4 Battery Pack for Power Tool, RC Toy, Electric Vehicle ... Charging, 0°C ~ 45°C ; 65±20%RH Discharging, -20°C~60°C ; 65±20%RHStorage ... storage condition shall be:<35°C;65±20%RH;3.2~3.9VCell Weight (Approx)40gCertificateCE,UL ... charge within half hour10. Perfect for building up battery pack for medical equipment Back-up or EPS Emergency ...