Features of LiFePO4 battery: High energy density About 1/3 the weight of lead- ... temperatureCharging ambienttemperature0~45°CCell skin temperature should not exceed 70°C .Discharging ambient,temperatur -20~55°CCell skin temperature should not ... exceed 70°CStorage temperature0~45°C 5.13 AppearanceWithout break, scratch,Distortion,contamination,leakage.