PRO Charging System PS1 Professional Series w/ (1) 12V Output PING 15A per Output PINGDual Pro PS1 12V 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 chargerThe Professional Series chargers have set the standard in the marine industry for