1, the data line contact is poor, it is recommended to change a line or use the original data line;
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2, the charging bank can not be charged 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 bank to try;
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3. The power supply of the charging treasure is excessive, resulting in no charging. Use a cable with usb ports at both ends, plug one end into the outlet of the charging bank, plug one end into the u port of the computer, one to three minutes, you can activate. Take it off and then charge it normally, it's good;
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4, check the charging treasure interface, circuit board, battery, to see where the fault, the most vulnerable charging treasure has the interface, battery, circuit board these three plates, any bad will lead to the charging treasure can not be charged or used.