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

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

    Amazon.com Price:  Original price was: $42.12.Current price is: $26.89. (as of 11/12/2025 16:34 PST- Details)

    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

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    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

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