1, non-original charger. The quality of the charger is very key, many chargers look the same, but the quality of the components inside varies greatly, if there is a charging process and then stop.
You can touch the charger is not hot, generally this case charging will be hot, the temperature is too high, resulting in the charging head automatic power off to protect the charger, avoid burning, the problem is reduced to normal, will automatically continue to charge, so the cycle.
2. The tail plug of the phone is in poor contact. Loose tail insert will also occur in this case, you can self-check to see if the tail insert is loose.
3, the data line and the tail plug do not match well, so it is necessary to replace a more matched charging line. Charging cable matching is generally matched just right, there will be no loose, if there is, please replace. Protects both the phone and the charger.
Clean the dust inside the data cable connector
If the data cable is used for a long time, some dust will inevitably gather in the connector of the data cable. If it is not cleaned up, the dust inside will accumulate thicker and thicker, resulting in poor contact during charging. In fact, it is very simple, just need to use a needle or toothpick to scrape back and forth the data end can be.
There are many possibilities.
1. Poor contact; Check the plugs.
2. The voltage is unstable; Try another venue.
3. Battery damage; Try a new battery.
4. Adapter problem; Try another adapter.
5, no problem, is the charging automatic protection phenomenon, which is the system automatic protection function when the system overheats, in the automatic protection of the battery, if a long time in the charging state, it will greatly shorten the service life of the battery, which is to be different from the above 1~4 failure.