12V Smart Battery Charger Auto Car Truck 6 Amp multiple stage charging cycles Key Specifications/Special Features: Voltage: Input: 120V AC/60Hz Output: 12 and 24V DC Charging current: 4A or 6A for 12V batteries 3A for 24V batteries 13.6V/4A power supply 16V/1.5A boost for severely discharged batteries Battery capacity: all types of 12V/24V Lead-acid(WET, MF, AGM and gel) Reverse polarity, overcharge and short-circuit protection Error beep warning with LED display LED power and charging indicators Detachable and interchangeable lead sets, clamps and eyelet terminals No Risk of Overcharging