Possible reasons are as follows:
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1. The car charger is in poor contact with the charging device
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2. The voltage of the car charger is too low to meet the needs of the charging equipment, resulting in charging failure;
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3. The voltage of the car charger is unstable, and the battery protection mechanism of the charging device works, resulting in charging failure;
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4. The quality of the charging device itself is faulty, resulting in charging failure.
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The charging principle of the car charger is the same as that of the ordinary charger, so the car charger can achieve the same effect as the ordinary charger