Product Details: Outfit your semi truck to be Ready for the Road Ahead™ with ready-to-go batteries, with the Associated Equipment 6/12/18/24V Heavy Duty Fleet Battery Charger. With a variety of amp and volt modes, this battery recharger is the ideal option to add energy to low power or drained batteries. Crafted with rugged 7" tires for easy maneuverability around shops. FleetPride is your First Click in Heavy Duty®.