This is definitely not normal.
1, to charge the phone did not charge for long, the normal 10400 MA can give the Apple 5s more than 3 times, so the capacity of the mobile power is a virtual target.
2, charge the mobile power supply, within a few minutes it is full to 3 grids, indicating that the power display of the motherboard has a problem, or the battery has a problem.
End: This mobile power supply is not a regular mobile power supply, should be fake.