When the mobile phone is charging, the automatic power off, the reasons are generally several: 1, the charging control circuit is faulty; 2, the charger is faulty; 3, poor interface contact; 4, the battery performance is close to failure.
According to the phenomenon you described, there are only two reasons: 1 is the charging head is broken (whether it is the original or it brand, the charging head is used inside the resistance, capacitor step-down rectification, and then voltage regulation into 5V power supply, the advantage is small size and large current, the current can reach 1-1.5A; The disadvantage is that the performance is not good, the voltage is unstable, and if the capacitor breakdown is possible to damage the phone); 2 is that the battery has failed, has not reached the nominal voltage and capacity.
Could be a damaged charging cable. Under normal circumstances, the plug of the charging cable is integrated with a power management chip, and the damage of this chip or the virtual welding of this chip may cause incorrect charging, which will produce the above phenomenon, just plug in a charging indicator but soon no longer. In this case, the general replacement of the charging cable can solve the problem.
The cause of disconnection may be:
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1: The charger is in poor contact.
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2: The power supply voltage is unstable.
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3: The phone charging port is not good.
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solution
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1. Wipe the charging plug and try it again. Replace the charging cable if there is a problem.
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2. Confirm whether the voltage is stable. I can't control that. Charge only when the voltage is stable.
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3, the mobile phone jack is damaged, to the repair shop to replace the mobile phone jack.