Schumacher SC-1200A-CA SpeedCharge 12Amp 6/12V Fully Automatic Battery Charger 12A Rapid Charger 6A Charger 3A Maintainer for Premium Charging Applications 12 Amp fully automatic microprocessor controlled battery charger Automatically adjusts the amperage rate to charge and maintain batteries Features float mode monitoring Auto Voltage Detection automatically detects 6 or 12 Volt batteries Reverse hook-up protection with LED indicator 12 Amp fully automatic microprocessor controlled battery charger Automatically adjusts the amperage rate to charge and maintain batteries Features float mode monitoring Auto Voltage Detection automatically detects 6 or 12 Volt batteries Reverse hook-up protection with LED indicator