Mastervolt Battery Mate 1603 IG Isolator - 120A, 3 Bank [83116035]Battery Mate 1603 IG Isolator 120 Amp, 3 Bank The Battery Mate is the ultimate solution for charging several batteries simultaneously and is compatible with any type of alternator battery charger, in both existing and new systems. As the voltage loss between the alternator and battery is negligible, the Battery Mate performs far better than conventional battery isolators. This ensures fast and complete charging of your batteries without having to make