Dual Pro SS4 Sportsman Series 40 Amp Battery ChargerDual Pro SS4 40 Amp (4 Bank x 10 Amp) Marine Battery ChargerWe are proud to add Dual Pro chargers to it's already stacked lineup of products. As a matter of fact, Dual Pro chargers are the only chargers that charge your batteries to 100% specific gravity every charge. Dual Pro chargers adjust current in the absorption and finish stages based on the battery's communication with the chargerSportsman chargers have all the safety and reliability features