... ,20A,25A,30A3.Output voltage : 12V,24V,48V,60V,72V General Features for li-ion li-polymer battery charger : 1,Ac input: 110Vac ... voltage selector for charger can use both 110Vac and 220Vac.2,Efficiency: 85%-90%.3,Cooling need a fan.4,Automatic,Advanced ,high ... from being electric shocked 24V 36V 48V 20A 25A 30A high power li-ion li-polymer battery charger