The battery level sometimes decreases or increases between 5 and 20% when restarting a device using the software it was originally released with. However, the battery level hasn’t really changed, and over time the battery indicator will be adjusted back to the correct level.
To make sure that the correct battery level is displayed, try these steps one after the other. Check whether the problem was solved after each step, before trying the next one.
- Note down the battery level shown when you restart or force a restart. When the device has been turned back on again, check if the battery level has changed. Differences of less than five percentages are normal.
- Fully drain the battery, then charge it to 100%. If possible, disconnect the charger when the battery is fully charged. Tip: You can install an app from Google™ Play that triggers an alarm or notification when the battery is fully charged.
- Update your Xperia™ device to a new software version using Xperia™ Companion.
- Restart your Xperia™ device in safe mode. In Safe mode, your device only starts with software and applications that were already installed when you purchased your device. If the device’s performance improves in Safe mode, it’s likely that one or more of your post-purchase downloaded applications are affecting the device negatively. Proceed by uninstalling any interfering apps.
- Perform a factory data reset or perform a software repair using Xperia Companion. Note! Always back up all personal data before performing a software repair. All data in the internal memory is overwritten during a software repair. Content on an external SD card is kept.
- Contact your retailer or Local support. Note! Before handing the phone over for service, backup using Xperia Companion to avoid possible data loss. Data on the device may get deleted when examined. Don't forget to bring proper documentation, for example, proof of purchase and warranty card. The documentation required may vary depending on market, country or region. If possible, deactivate the Protection by my Xperia and remove the Google™ accounts on your device before sending it in for service or repair to prevent Protection by my Xperia or Google™ Device Protection from locking your device.
