1,Sealed Lead-acid battery charger 2,Switching Mode Power Supply,MCU control . 3,DC: 12V,25A. 4, ... 110Vac and 220Vac.2,Efficiency: 85%-90%.3,Cooling need a fan.4,Automatic,Advanced ,high frequency,swich mode design allows ... inquiry,any questions about 12V/25A battery charger. 12V/25 A Lead-acid Battery Charger