... 110V/220V voltage selector for charger can use both 110Vac and 220Vac.2,Efficiency: 85%-90%.3,Convection cooling eliminates the ... colors.7,Over current, over voltage. over temperature, short circuit and reverse polarity protection.8,Led display charging states.9,Can ... ,Operating temperature:0-50 ,Storage temperature:-10 - +60 . fast charging and maintenance free forklift battery charger