How does the mobile power charge?
2. your mobile power, the internal lithium battery capacity attenuation or too small, the latter your cell phone battery capacity is great.
You re-plug the first to determine the plug to plug the good.
The reason may have 1) your plug is not plugged in, 2) your mobile power built-in charging circuit has problems and can not work properly.
1. You rushed to a night of electricity and did not rush to the mobile power inside.