The Autoexact is a portable and automatic battery charger. It can be used for 12V lead-acid and 12V lithium-ion batteries. The Autoexact is designed for charging cars, boats, RVs, SUVs, diesel trucks, motorcycles, ATVs, snowmobiles, personal watercraft, lawn mowers, and much more. It can be used as a battery maintainer to keep both starter and deep-cycle batteries fully charged. It also monitors battery activity for safe and efficient charging without any overcharge.