... or we can make 110V/220V voltage selector for charger can use both 110Vac and 220Vac.2, ... ,Cooling need a fan.4,Automatic,Advanced ,high frequency,swich mode design allows more efficient,faster ... protections: Over Voltage protectionShort Circuit protectionPolarity error protectionOver power protection Warning: Don't expose the product to ... 36V 48V 20A 25A 30A high power SLA li-ion battery charger for