How to Check the Battery Level in a Car?

1 Answers
VonArcher
07/29/25 8:18pm
Methods to check the car battery level are: 1. Observe the feedback when starting the car—if it feels significantly harder to start, it indicates the battery is low; 2. Check the battery warning light—if it stays on, it means the car battery is almost depleted and needs immediate charging; 3. Press the car horn directly—if the horn sounds weaker than usual, it is due to a low battery. Precautions for car battery charging include: 1. The car should not be completely powered off, so if using a charger, connect it directly to the battery without removing it, as this could lead to data loss requiring initialization, commonly referred to as decoding or code matching; 2. If the battery voltage is 10% lower than the rated voltage, there is a risk of battery drain, and it should be fully charged at least once a month.
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