for the following reasons
1. The phone will be disconnected repeatedly when charging, because the data cable or charging head is in poor contact, you can check whether the data cable or charging head is loose or damaged, check the 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, 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 carry the mobile phone to the after-sales maintenance point for testing.
This situation is basically caused by poor contact of the charger, this situation you find someone to repair and replace, this is a hardware problem to replace, maintenance processing can be solved