... LED instruction: single-color LED light indicates that AC power has beenconnected, two-color LED that is red when charging, the green light ... 110V/220V voltage selector for charger can use both 110Vac and 220Vac.2,Efficiency: 85%-90%.3,Convection cooling eliminates ... colors.7,Over current, over voltage. over temperature, short circuit and reverse polarity protection.8,Led display charging states.9,Can ...