Input voltage: 100-240V Output voltage/current: 12.6V/1A-3A Fuel gauge led: 1 led indicator Output protection: Over voltage protection, over current protection, short circuit protection. Remark: The charging current can be accordance with the requirements of our customers. 1cell lithium battery charger 4.2v/500mA 2cell lithium battery charger 8.4v/500-800mA 3cell lithium battery charger 12.6v/500mA-1A 4cell lithium battery charger 16.8v/2A Other lithium battery charger 12V/2A~5A, 24V/2A~5A, 36V/2A~5A, 48V/2A~5A Safety approval: UL, CE, EK, PSE.