Making sure that your device’s battery percentage is accurate is important in optimizing usage times for your device. Here’s a step-by-step list to help you troubleshoot this issue:

1. Make sure your device is fully charged, then unplug and use it


2. Uninstall recent downloaded apps to see if any of them are causing odd behavior


3. Reset all settings


4. Back up your data to iCloud/computer and Reset/Restore your device

If none of these steps resolve the issue, then contact your device’s manufacturer for further help.