This Marine UL listed 9000 series battery charger uses self-regulating ferroresonant transformers devoid of any complicated switching circuits to charge up to three battery banks simultaneously. Built with rugged stainless steel enclosure and UL recognized, high-quality components to withstand the marine environment. Accurately charges lead acid batteries only. Features include an easy-to-read ammeter to indicate rate of charge and ignition-protected components for safety. Drip shield included.