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Why Can't 2 9 volt batteries start a car?

Updated: 12/11/2022
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10y ago

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Two nine volt batteries connected in series put out a nominal 18 volts, which is more than enough potential. However, the current draw of the starter is a lot more than two tiny 9V batteries are capable of. There's a reason car batteries are so large, despite only putting out slightly more voltage than a 9V battery does.

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Q: Why Can't 2 9 volt batteries start a car?
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