If you just upgraded your iPhone to a new version iOS system from the old version for example from iOS 10 to iOS 11 or iOS 9 to iOS 11, you may notice that your battery is draining twice as fast or more after the upgrade. Sometime system can be lagging too. You may heard that you can turn off some features to help the battery to stay longer. However, if a smart phone needs to turn off all the features, what is the point of having a smart phone right? Here is what you can do if you experience battery issue after upgraded.
If you just finished the upgrade, let your new system reindex everything! It will take couple hours and use some battery, that is normal.
Step 1, connect your phone to the charger and let it charge until 100% and hard reset your iPhone with the charger connecting using below methods. For iPhone 6/6S/6S+, press and hold the Home button. At the same time, press and hold the Power button until you see the Apple logo. For iPhone 7/7+, press and hold the Lock/Wake button. At the same time, press and hold down the Volume Down button until you see the Apple logo. For iPhone 8/8+, and iPhone X,
- press and quickly release the Volume Up button.
- Press and quickly release the Volume Down button
- Press and hold the Side button (power) until you see the Apple logo
Step 2, after your iPhone restarted, continue charge for ~10 mins and you are good to go.
You can find the reset option in Setting > General > Reset > Reset All Settings. All setting will be reset but your personal items like photos, musics, and other things will remain. Do NOT select Erase All Content and Setting unless you want clean phone!
Revert back to the previous version and wait for Apple to release the newer version to fix the issue.