1, is the data cable with data, there will be such a problem, should use the original data cable of the charging treasure, because the USB port of the charging treasure may be incompatible with your data cable.
2, may be the joint contact is not good, resulting in leakage. Or there is a problem with the charging bank, the positive and negative output is reversed, and the problem can not be used for the time being.
3, the phone may be infected with a virus, and the power consumption increases. Some charging treasure overload will cut off the output, there will be a charging interruption. It is recommended to use a charging bank with a large current (sufficient 2A) output.