How to Tell If the Car Battery Is Dead

1 Answers
DiColin
07/30/25 7:43am
Methods to check the battery power: 1. Feel the feedback when starting the car. If it feels particularly difficult to start, it is likely due to a weak battery; 2. Battery warning light. If this light stays on, it indicates that the car battery is about to run out of power and needs to be charged promptly; 3. Press the car horn directly. If the horn is not as loud as before, it is likely caused by a weak battery. Car charging precautions: 1. Some cars cannot be completely powered off. Therefore, if using a charger to charge, connect directly to the battery without removing it, otherwise data loss may occur, requiring initialization, commonly known as decoding or code matching; 2. If the battery voltage is 10% lower than the rated voltage, i.e., below 10.8 volts, the battery is at risk of being weak and should be fully charged once a month.
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