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1, there are mainly the following three reasons: (1) the wire interface is wrong; (2) Insufficient voltage or current; (3) The mobile power supply is insufficient
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2, solution: (1) For the wrong interface, if your mobile phone interface and charging bank interface is not applicable, you should find a wiring. If the interface is the same, or can not be charged, it is necessary to check whether there is poor contact between the two interfaces of the data cable, it is recommended to change a data cable test.