EmergencyLifePo4BatteryPackVoltage 12V Capacity15Ah/8Ah ExepectedServiceLife10years Lifecycle1500times PeakPower1800A(15Ah) 1920A(8Ah)ChargingCurrentACcharge1AWeight3Kg(15Ah)2.3Kg(8Ah)DemensionL*W*H290mm*190mm*100mmBuzzeralarm2.9-3.0V/CellBuzzeralarmforlowbattery2.5V/cellBuzzeralarmstop 2.5vLedlightRaidoandUSBPoweroff.