1, when the charging treasure is not charged, first check whether the charging cable is broken, you can try the data cable that comes with the phone to charge the charging treasure, if the charging cable problem is changed over the data cable should be able to solve it.
2, ensure that the charging wire plug contact is good, if it is the problem of poor contact, then as long as the plug firmly or try to plug it in the reverse, and fortunately, the charging treasure intact no problem.
3, the charging treasure can not be charged, maybe because the charging head is not good, or the output current is too small, you can use the computer to charge, or change the 2A adapter to charge the charging treasure. If the above two methods have been tried, and still can not be charged, then the charging treasure is broken.
4, when the mobile phone is not charged, you can change the original data cable of the mobile phone, try to charge the mobile phone, or change another charging bank to charge the mobile phone, if there is another charging bank to charge the mobile phone, and this can not charge the mobile phone, then basically it can be concluded that the quality of the charging bank is not good, it is time to take it to repair, or change a charging bank.
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There are two main reasons why the power bank cannot be charged.
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One is that the charging circuit on the charging bank is damaged; The other is that the rechargeable battery has expired; First replace the same type of rechargeable battery to try, once it can be charged, it proves the previous judgment is correct. If it cannot be charged, it is the fault of the charging circuit. The charging circuit can be found online.