Schumacher SP-1 2/4-Amp 6/12-Volt Automatic Battery Charger/Extender

Schumacher’s SP1 Battery Extender is a universal 2/4-ampere automatic charger for 6- and 12-volt batteries. This charger uses microprocessor-controlled technology with multi-stage charging for added precision, safety and battery life. Auto-Voltage Detection will automatically select the battery voltage. The SP1 charges your batteries up to 3 times faster than competing chargers.
Automatic charger for 6- and 12- volt batteries
6 Volts at 4 Amps, 12 Volts at 2 Amps
Automatically determines if the battery is 6 or 12 volts
Quick Connect Harness easily changes between battery clamp and ring terminals
Ideal for power sport vehicles, motorcycles and small cars