The 10A 12V 120VAC 50 60Hz Charles 5000 SP Series Battery Charger allows you to charge Lead Acid (Flooded), GEL or AGM type batteries due to fact that Charles 5000 SP Series Battery Chargers are the only Marine UL listed chargers available with a battery type selector switch. Charles 5000 SP Series are tested by Marine UL for safety and durability against impact, vibration, temperature and shock. Each Charles 5000 SP Series Battery Chargers has 3 stage charging, with temperature compensation, delivering a tremendous charge when the battery is most able to accept it, thereby it prevents overcharging and extends the life of the battery. It is possible to restored simultaneously up to 3 battery banks. The 10A 12V 120VAC 50 60Hz Charles 5000 SP Series Battery Chargers, can be used as a DC power supply to power such components directly as bilge pumps, lights, etc. without any battery in the system.