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154 1301 03 January 2013 Randys Electrical Corner 12 Volt Wiring Diagram

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On the other hand, if you live in a cold climate or just have issues cranking your engine over in the morning, hooking two batteries up in parallel could be for you. In this example, we keep the 12 volts that the vehicle needs to run, but we would get 110 amp/hours out of them, which means if we had something that drew 5 amps, we could run it for about 22 hours before killing both batteries (divide the number of amp/hours by your amp usage for how many hours it’ll run).