Or you can find the settings in Settings-Application Management, try to cache them clearly, and then correct the battery. Use up the cell phone battery, turn it off and let it stand for more than 5 hours to fully charge the cell phone. After completing this process, the battery display should be able to return to normal.
If the factory settings cannot be restored, it is recommended to back up the data in the mobile phone in advance and try to upgrade to the latest version. If it is still not feasible, back up the data and take the purchase invoice to Huawei for after-sales inspection. Click "Mobile Service (Member Service)-Service Network" in the mobile phone to inquire about the latest Huawei after-sales service.