Battery Chargers for Lithium Ion (LiPo), Absorbent Glass Mat (AGM) and conventional lead acid (pb) racing and hi performance batteries. A race car battery charger does different duties, depending on what season it is. During peak race season, we need to keep our battery topped off to keep alternator drain to a minimum, freeing up every last horsepower. In off season, we need to maintain the battery to prevent plate sulfation and other battery degradition issues, so come race season we are ready to go. Cheap insurance is found in a correctly chosen battery charger/maintainer.