Check the charging cable. The general feeling is that the charging treasure charges for a while, and does not charge for a while, which is often caused by poor contact with the charging line.
Or there is another case that the charging jack is not firmly inserted, and there is also poor contact.
There is also a case that the battery power of the charging treasure decreases, and when the battery is disconnected and charged, the battery power is slightly restored, and it can continue to charge.