Item No.: UY900 Input : 110V/220V, 47-63HZ Specification : DC12V 40Amp Constant Charging Voltage : 16.8V (4s lithium battery) Constant Charging Current :30-40A Charging Mode : 3 Stages, CC, CV, Trickle Material : Aluminum alloy with Fan Dimension : 220*135*70mm Net Weight :3.0kg Application : Electric Vehicles & Tools Various Protection : Over current , Over Voltage , Over Temperature , Short Circuit and Reverse Polarity. Warranty: 12months Products can be Customized! ​--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Features: Smart charger for this product. The use of switching power supply technology, superior performance electric bicycle ,e-golf cars ,Family battery storage system lithium battery charger dedicated, It has the characteristics of the following advantages: 1. CE &CB& ROHS Certified, Safety and High Quality. 2. Full automatic transition of CC, CU and Float/cut-off. 3. Precise limit of voltage & current, guarantee fully charged and avoid over charge. 4. Protections: over current, over voltage, short circuit and reverse polarity. 5. High Efficiency: 95%-98%, PFE: 0.96, Eco-friendly. 6. Two LED indicators, Aluminium, elegant and reliable.