This situation should be, the mobile power into the charging protection state when charging the mobile phone, overcharge or high voltage will make the mobile power into the charging protection state, this time to charge the mobile power is not charged. When the mobile power is fully charged, if it is not unplugged for a long time, the mobile power will enter the charging protection state, this time you do not know, when the mobile power is used up and then charged, there is no problem. Solution: Plug the mobile power into the USB output of the computer for a few hours, you can remove the charging protection state, and then you can use it normally.