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Quick Power 120 Amp Battery Isolator Bi303303

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Run extra accessories without worry of your vehicle not starting!

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Product InformationStore Part Number: Bi303303


Battery Isolator switch for up to 120 Amp alternators conveniently allows for adding a spare battery to run accessories in your car, boat or RV. This fully automatic switch allows for your engine alternator or aux battery charger to charge 2 batteries, while keeping the batteries electrically isolated from each other. This means that you can run your spare battery down, without worry of running down your starting battery.

This waterproof unit will work in a marine environment, as well as stand up to extreme heat. The Battery Isolator switch will prevent current flow from one battery to another, thus allowing each battery to be an independent power source


  • Rugged extruded aluminum build
  • Withstand harsh enviroments
  • Reliable Solid state circuitry
  • 1 year warranty


Make sure your batteries are of same design. If battery types are mixed, you may damage one or both.

Tech Specs

  • Dimensions (LxWxH): 5 x 4.5 x 3.5 in
  • Weight: 1.7 lb
  • Shipping Weight: 2 lb
  • Output Amperage, Max Continuous: 120 A
  • Model: Bi303303
  • Manufacturer: Quick Cable
  • Enclosure: extruded aluminum
  • Regulatory Approval: Complies with Fed Spec KKK-A122C
  • Manufacturer Part #: Bi303303
  • UPC: 017378129424
  • Made In: China

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Specification Sheet

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