Product overview the vatrer e15-58.4V20a is a high-quality, economical battery charger designed for lithium batteries. It operates on an ac input voltage range of 90-260v and features a three-step charging program: constant current, constant voltage, and float charging. Specifications dc output: maximum voltage: 58.4V maximum current: 20a maximum power: 1160w ac input: nominal voltage: 100-240v frequency: 50 60hz maximum current: 13a mechanical: dimensions: 28.1 X 14.5 X 8 cm weight: 7 lbs 3.2 Kg environmental: operating temperature: -20 to 65 storage temperature: -40 to 85 humidity: 5%-95%. Led status indicators solid green: charger ready or charging complete. Green blinking: charger is currently charging. Red blinking quickly: input power failure. Alternating red and green blinking: short-circuit or reversed battery connections. Overheating alarm: red blinks 2 times, with intervals. Over-current alarm: red blinks 3 times, with intervals. Over-voltage alarm: red blinks 4 times, with intervals. Safety warnings do not leave the charger unattended while connected to power. Ensure the charger is only connected to the specified ac voltage. Avoid placing the charger on flammable surfaces or near flammable materials. Maintain proper airflow around the charger and avoid short-circuiting