On this issue, it is first necessary to check whether the original charger is normal (if necessary, consider replacing the test
I know).
(2) Check whether there is poor contact inside the original charging data cable (if necessary, you should also consider replacing the test).
(3) Check whether there is poor contact between the charging data cable plug and the mobile phone charging tail plug
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Check whether the battery inside the mobile phone is normal (this requires professionals to test the mobile phone battery
I know).
If the above checks are normal, the problem may be caused by a fault in the charging control circuit on the motherboard