The Schumacher XC6 is a fully automatic microprocessor controlled 6 ampere fast charge charger monitors battery condition and adjusts charge rate downward to prevent battery damage. Perfect for car, small truck, motorcycle, lawn tractor lead-acid and AGM batteries. A 4 ampere medium charge has a self-adjusting charge rate ideal for everyday charging needs and keeping your battery in peak condition. The 2 ampere slow charge is great for charging and maintaining small batteries; charges motorcycle, ATV, snowmobile and lawn tractor batteries. The auto voltage detection means the charger automatically determines whether the connected battery is a 6 volt battery or a 12 volt battery.