ProMariner ProTournament Elite Gen3 360 Waterproof Battery Charger 36 Amp - 4 Bank The ProMariner ProTournament is the fastest battery charger with the most features in its class. This onboard charger has been specifically designed to deliver maximum charging performance to extend battery life. Using advanced thermal modeling, the ProTournaments tri-surface aluminum heat sink delivers true-rated constant current charging amperage for the fastest charge times. Give your batteries what they demand