This 12 ampere fast charge charger monitors battery condition and adjusts charge rate downward to prevent battery damage. Perfect for car, light truck, marine, RV, farm equipment, AGM, gel cell and deep-cycle batteries. The 8 ampere medium charge has a self-adjusting charge rate for everyday charging needs and keeping your battery in peak condition. The 2 ampere slow charge is ideal for charging and maintaining small batteries. Easily charge 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.