... .Output voltage : 12V,24V,48V,60V,72V General Features for li-ion li-polymer battery charger : 1,Ac input: 110Vac or 220Vac as ... can use both 110Vac and 220Vac.2,Efficiency: 85%-90%.3,Cooling need a fan.4,Automatic,Advanced ,high frequency,swich ... color. Also supply OEM service as per customers' required colors.7,Over current,over voltage.over temperature,short circuit and reverse ...