ProMariner ProSportHD Gen 4 Battery Charger 20 Amp - 3 Bank ProSportHD Generation 4 features a tri-surface heat-sink design for a long service life and reliable performance. In addition, its heavy-duty lightweight design delivers significantly faster charging via optimal cooling, to consistently deliver true-rated amp output during charge mode. This ProSport battery charger is designed for use in harsh environments with our industrial grade jacketed DC and AC power cables which include molded st