How many volts are in a standard car battery?


Quick Answer

The standard car battery has 12 volts. A fully-charged battery is essential to starting the car and provides power to the light and other car accessories.

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Full Answer

A voltmeter is needed to test the charge of a car battery. Before testing, the car and the lights must be turned off. The owner then connects the voltmeter���s positive, red lead to the battery���s positive terminal, and the negative, black lead to the battery���s negative terminal. The voltmeter then produces a reading anywhere from 12.66 to 11.89, depending on the outside temperature. A voltage reading less than 12.45 indicates that the car battery is less than 75 percent charged and needs to be recharged. Leaving a battery at less than a 75 percent charge for more than a few days can cause permanent damage.

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