... O2 Configuration3S4PNorm voltage12VMax charge voltage12.6VStorage conditionsTemperature: -20~60 deg. C Humidity: 45 ± 10%R. HOver charge protection voltage4.20-4 ... an open,well ventilated,dry,clean area, between -20°C to 40°C for maximum life. self-discharge will accelerated at higher ... t expose the battery to extremes of temperature over 60°C,directly to sources of heat, direct sunlight or moisture and ...