BATTERY CHARGER WITH AUTO OFF. 10/2/55 6.5 ft power cord and 6.7 ft battery leads. 55 A assist setting for batteries too weak to start an engine. Manual 10 A charge setting for both 6 V and 12 V batteries. Reverse-polarity protection. Features: Automatic shut-off when charging is complete Full-charge indicator light. Built-in ammeter to monitor charging progress. Charges deep-cycle and maintenance-free batteries.