3 stage Charging Profile. Constant Current, Constant Voltage, Float (13.7v) Ambient Temperature: -20°C to +50°C Cooling: Fan Cooling Charger Type: 3 step, full automatic switch mode Terminals : eye terminals Batteries: 12V lead-acid batteries Dimensions: 235*102*56mm Net Weight: 0.92KG Protection: Reverse polarity, output short circuit, overload, over current, overheat. Suitable for 12v batteries between 80AH and 400AH. It can charge conventional Flooded Lead Acid, Calcium, VRLA & GEL batteries.