ProMariner ProSportHD Gen 4 Battery Charger 20 Amp - 2 Bank ProSportHD Generation 4 boasts a tri-surface heatsink design. This heavy-duty lightweight design delivers significantly faster charging through optimal cooling, while delivering true rated amp output during charge mode. ProSportHDs enhanced microprocessor and software provides digital features including fuel gauge style Charge Completion Monitor, Charge Mode, individual Fault indicators and three digitally selectable performance charge