This is because of the output problem of the mobile power supply.
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1, when the mobile power supply is charging the mobile phone, the mobile phone shows that it is charging, and the power of the mobile phone has not risen, but it is lower, this is because the output of the mobile power supply is too low, the output current is not as fast as the power consumption of the mobile phone background, so this situation will occur.
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2, under normal circumstances, mobile power is not such a situation, this situation may be because the mobile power motherboard booster board failure, it is recommended to find the manufacturer directly repair or replace.