What is the general voltage of a car battery?

1 Answers
Sid
07/29/25 11:47am
A car battery is generally 12 volts. The working principle of a car battery is: during charging, electrical energy is converted into chemical energy, and during discharging, chemical energy is converted into electrical energy. When the battery discharges, metallic lead is the negative electrode, which is oxidized into lead sulfate; lead dioxide is the positive electrode, which is reduced into lead sulfate. When the battery is charged with direct current, lead and lead dioxide are produced at the two electrodes respectively. After the power is cut off, it will return to the pre-discharge state and form a chemical battery. Methods for maintaining a car battery include: 1. Regularly clean the battery; 2. Reduce electricity usage when the engine is off; 3. Replace the battery periodically; 4. Start the car regularly.
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