Is 12v Enough To Start A Car

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Is 12v Enough To Start A Car. 124v is a bit low for a good battery though - should really be 127v so might be that one. With the engine off you should get a reading of 126 volts.

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To summarize and refine the answers. A fully charged car battery has 126 volts. The higher the CCA rating the greater the starting power of the battery.

At 10 years old its time for a replacement.

141v with engine running. Car failed to start this morning. Voltage is not an indication of a good battery. Same after removing 12v ground from battery replacing but 12vbattery at terminals car OFF reads 123v which is about half charge for what should be a fully charged battery.