This advanced fully automatic three-stage 12 Volt, 15 Amp battery charger is ideal for charging all types of 12 volt lead-acid batteries. Features switch mode technology for high efficiency, lightweight & quiet operation, automatic operation for all lead acid batteries flooded, AGM or Gel cell, charges 3 banks of batteries simultaneously, no isolator necessary, can be used as a power supply or DC UPS when used in a conjunction with a battery, user configurable AC input voltage 120 or 230 VAC 50/60 Hz, selectable for 2 or 3 stage, rapid & safe charging of stand-alone & loaded lead acid batteries, Ammeter & LED power status indicator, short circuit, overload & reverse polarity protection, convection cooled.