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Price: $ 6.99
Use your 12-Volt Appliances Anywhere. Makes a Great Tester.
Hook directly to your battery. Store for that emergency. RoadPro’s 12-Volt Lighter Adaptor. Use it for testing when your not sure if it’s your lighter adaptor or the 12-Volt appliance that is causing the problem.
We all know how easy it is to be mislead by a loose or faulty lighter adaptor. And anyone can do it, because you do not need to have a technical background. Well... You do need to know what a battery is and which side is Positive and which is Negative.