Keep your car or boat battery charged and in tip-top shape with the Ship 'N Shore 15A Rapid Battery Charger. This charger automatically detects battery voltage for easy setup, charging both 6V and 12V batteries. Reverse hookup protection guards against electrical shock or fire by inhibiting operation and throwing a fault LED indicator light. Plus, the microprocessor automatically adjusts amperage rate to charge and maintain batteries, without overcharging, and a digital display makes for easy setup and status checks. Auto voltage detection Charges both 6V and 12V batteries Reverse hookup protection Microprocessor automatically adjusts amperage rate Digital display