Blue Seas CHARGER 12V 40A3BK - 7522Advanced Multi Stage Charging Three outputs provide charging for up to three battery banks Rugged, finned aluminum case and large internal heat sink Universal Line Voltage 90 265V AC 50 60 Hz for use anywhere in the world Field serviceable AC Input power protection Selective Float moves each battery individually to float voltage ending absorption period to prevent overcharging User selectable charge profiles for lead acid, gel, AGM or new Thin Plate