The 12-Volt PowerPulse is designed to ensure maximum battery performance on single 12-volt lead-acid batteries. It also works on two or three 12-volt batteries connected in parallel. This unit is ideal for virtually any kind of vehicle or equipment that is charged on a regular basis, including cars, over-the-road trucks, delivery trucks, boats, emergency vehicles, generators and much more. It comes with lugs that connect directly to the battery terminals. Powerpulse is not a charger, it cleans sulphur from lead plates allowing the battery to hold more power and perform like a brand new battery continually.