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can i use two batte...
 
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can i use two batteries in two running cars to jump a third?

  

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say you got a big truck with a dead battery that needs a lot of CCA. can you use two small cars with smaller batteries and lower CCA (which aren't enough to jump the truck) both of them hooked up to the dead truck and jump it?


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Why you caught? As long as you don't have any of the vehicles running. You would not want two alternators to be running hooked up to a third car. But if both cars are turned off that's fine


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