Is It Normal for a Car Battery to Heat Up During Charging?

1 Answers
VonJordan
07/30/25 5:49am
The heating of a car battery during charging depends on the degree: slight heat is normal; excessive heat is abnormal. Reasons for battery heating during charging: 1. Poor quality or mismatched charger; 2. Issues with the battery itself. Functions of the car battery: 1. When starting the engine, the battery supplies power to the starting system, ignition system, and electronic fuel injection system; 2. When the engine is off or at low idle, it powers the vehicle's electrical equipment; 3. Assists in powering electrical devices when the alternator's output is insufficient; 4. Mitigates voltage surges in the electrical system to protect electronic components; 5. Stores excess electricity generated by the alternator.
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