Fully automatic.

6 amp medium charge monitors battery condition and adjusts charge rate downward to prevent battery damage, for car, truck, motorcycle, ATV, snowmobile, lawn tractor lead acid.

4 amp medium charge has self-adjusting charge rate ideal for everyday charging needs and keeping your battery in peak condition.

2 amp slow charge for charging small batteries and maintaining large ones, charges motorcycle, ATV, snowmobile, and lawn tractor batteries.

50 amp clamps for top and side-mounted battery posts.