There are several reasons for the automatic power off when the mobile phone is charging:
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. You can verify that the method is to plug the phone into the computer or use the switching power charger (that is, the old big charger with USB interface) on the charge, if the power is constantly, then it is the problem of the original charger, on the contrary, if the fault is still, then the battery has failed. It is recommended that when charging the mobile phone, you should try to choose a switching power type charger, but the charging current should be controlled below 0.5A, so that the phone can avoid hot charging, but also to extend the life of the battery.
1. The mobile phone charging will be charged and broken because of the poor contact of the data cable or charging head, you can check whether the data cable or charging head is loose or damaged, check the mobile phone charging interface, whether the power supply is intact, and try replacing the power supply.
2 plug output voltage, current is not enough, which is determined according to the principle of charging, must be high voltage flow to low voltage, mobile phone is generally 3.7V, produce high voltage flow to low voltage for charging, but if the plug voltage is not enough, it will be intermittent.
3. Related to the mobile phone itself, it may be that the resistance value of the mobile phone is too large, it is recommended to bring the mobile phone to the factory maintenance point for testing.
There is no such case, if there is, it may be the charger overheating to protect itself