In the Moto G we can see the notification bar the percentage of remaining battery power. You can jump to wrong numbers, 50% load, 1% and then back to the middle. If it happened to you you may have a battery calibration error could be related to a software upgrade. The downside of the Moto G is that the battery is not removable or replaceable. Try this:
1. Let the terminal is fully discharged and turns itself off.
2. Then charge it to 100%
3. Repeat the process once more.