Is It Normal for the Battery to Get Hot While Charging?
2 Answers
It is not normal for the battery to get hot while charging. During the charging process, chemical reactions occur inside the battery, which generates heat as current flows through it. Slight warmth is normal, but if the battery becomes excessively hot or too hot to touch, it is abnormal, and charging should be stopped immediately. Reasons for battery overheating during charging: 1. Poor-quality or incompatible charger; 2. Battery issues, such as aging, where sulfuric acid crystals form during charging and discharging, sticking to the lead plates, increasing resistance and causing heat; 3. A short circuit in an individual battery cell; 4. Increased usage frequency leading to gradual loss of water molecules in the battery.
I also used to worry about battery overheating during charging when driving. Actually, mild heat generation is quite normal, mainly due to the chemical reactions producing heat, just like how your phone gets warm while charging. But if it feels scalding hot to the touch, that's definitely not right. It could be due to battery aging, or the charger voltage being too high causing overcharging, which may damage circuits or even cause fires. I remember once my car battery overheated badly, and after inspection, it turned out to be loose wiring connections that almost affected startup. I recommend regularly checking the temperature by touch to ensure it stays within warm-to-the-touch levels. Avoid charging under direct sunlight in summer and maintain good ventilation. If you notice any issues, don't delay – get it checked at a repair shop immediately. Safety comes first, as nobody wants to be stranded on the road. Regular maintenance like cleaning terminal connections can also prevent overheating.
