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Your question needs clarification. Car battery, Cell phone battery, camera battery, etc.

Question was posted in car batteries category.

You can check it with a digital volt meter car not running. Set the meter to 20 volts DC. Here is what you will see.

12.6 volts = 100% charge

12.4 volts = 75% charge

12.2 volts = 50% charge

12.0 volts = 25% charge

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13y ago

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