Input voltage: AC100-240V, 50-60Hz Output parameter: Ni-MH battery charger: DC10-30V 500-2000mA, charging 6-15pcs sealed batteries, intelligentized MCU control mode Lead-acid batteries charger: 12V battery: DC13.8V 2000-4000mA 24V battery: DC27.5V 1000-2000mA Li-ion battery charger: DC12.6V 2000-4000mA, 16.8V 2000-3000mA, 21.0V 1000-2000mA, 25.2V 1000-2000mA Power supply adapter: 12V 1000-4000mA, 18V 1000-3000mA, 24V 1000-2000mA, 30V 1000-2000mA LED display: 1 LED 1 color which indicates power on 1 LED dual-color, red LED will light up to indicate that charging is in process, green LED will light up to indicate charging completion Dimensions: 73 x 42 x 27mm Weight: 86g Constant charging current and voltage, short-circuit protection