By Lena / Last update July 5, 2021

The new features have tempted a lot of iPhone users to upgrade to the brand new iOS 15. However, quite a few people find that the iPhone’s battery life isn’t good after installing iOS 15, it is faster than normal battery drain.

iOS 14 Battery Drain

Well, the battery problems are quite common after iOS update. Besides battery drain, some users also find the iPhone feel warm or even hot when it’s not doing anything. Don’t panic. Keep reading to see the way to fix iOS 15 battery drain issue and also some tips to extend the battery life.

Part 1. How to Fix iOS 15 Battery Drain on iPhone iPad?

Actually, after an iOS update, a lot has to happen in the background to bring things back to normal. It may take a few days to download your contacts, photos, or other things from iCloud to your device. Besides, it will also recalibrate battery life.

This means it will consume more power and the battery meter may not be read correctly. So you can let the iPhone go through several charge/discharge cycles. If you still suffer bad battery life after a few days, try the following solutions to fix the “iPhone battery draining fast after iOS 15 update” issue.

Solution 1. Restart Your Device

The first thing you can do is restart your iPhone. A simple restart always helps solve iOS related issues. Turn it off and turn it on after a minute or more.

Solution 2. Force Restart Your Device

If the restart cannot help you fix the iOS 15 battery problem, then you can try to force restart your device. It will kill the apps running in the background and also help fix iOS errors that cause the battery drain.

● Force restart iPhone 8 and later & iPad with Face ID:

Quickly press and release the Volume Up button > Quickly press and release the Volume Down button > Press and hold the Side/Top button until you see the Apple logo.

Hard Reset iPhone

● Force restart iPhone 7/7 Plus:

Press and hold the Power button and Volume Down button together > Release both buttons when the Apple logo appears.

● Force restart iPhone 6s, SE and earlier & iPad with Home button:

Hold down the Home button and the Power button at the same time > Release both buttons when the Apple logo appears.

Solution 3. Check What Are Eating Your Battery

To fix the iOS 15 battery drain issue, the key is to figure out what is draining the battery. You can go to Settings > Battery to have a check. It will show you the Battery Usage by App. If you find any apps you don’t need are consuming too much battery, you can delete it.

Check Your Battery

Besides, also check the Screen Off activity. If you find the time more than an hour, it’s likely to be an issue. You can tap Show Activity and it will tell you if you have an app consuming battery in the background. To turn off the background app refresh, you can go can to Settings > General > Disable Background App Refresh > Disable this for individual apps.

Solution 4. Reset All Settings

If the apps are not the source of the problem, you can reset your iPhone. It will not erase any existed data on your device but restore settings to factory defaults. You will need to re-enter the password to join the Wi-Fi network. Go to Settings > Tap General > Tap Reset > Choose Reset All Settings > Enter your passcode to confirm.

Reset All Settings

Solution 5. Downgrade to iOS 14

Apple always continues releasing new iOS to fix bugs and errors. You may wait for the next update that may fix the iOS 15 battery drain issue. However, if you cannot wait for the next iOS 15 update, you may choose to downgrade to iOS 13. For detailed steps, refer to this How to Downgrade from iOS 15 to iOS 14 without Losing Data guide.

Part 2. Other Tips to Improve Battery Life on iPhone iPad

The above are main solutions that can help you fix the “iPhone battery draining fast after iOS 15 update” problem. Below are some tips that can help you extend battery life in daily life.

Tip 1. Limit Location Services

Various apps want to know and use your location and it will drain your battery. You can set it to access your location while using the app or totally turn it off.

Go to Settings > Tap Privacy > Tap Location Services > Tap the app that you want to adjust > Four options for you to choose: Never, Ask Next Time, While Using the App, and Always > Choose one based on your needs.

Limit Location Services

Tip 2. Limit Apps Using Bluetooth

You can also choose to turn off the Bluetooth connection for some apps that you do not have to. It can make sure that there is no sneaky app in the background that trying to connect to Bluetooth as it can drain your battery. Go to Settings > Tap Privacy > Tap Bluetooth > Toggle off any app that does not need a Bluetooth connection.

Tip 3. Use Wi-Fi Whenever Possible

Apple says that Wi-Fi uses less power than the cellular connection. So you can connect to Wi-Fi whenever possible to save battery life.

Tip 4. Turn off Notifications

Your iPhone screen will light up every time when you receive a notification and it will drain your battery. You can go to Settings > Notifications to adjust whether or not an app can send you notifications.

You can also make it from the notification itself on the Lock screen. Long press on a notification and then tap the three dots > Choose Deliver Quietly or Turn Off...

Notifications Messages

Tip 5. Don’t Close Apps

Manually closing apps will drain more battery. Closing an application will clear it from the iPhone’s memory, and it will need to be reloaded when it is reopened, which may have a greater impact on the battery.

Tip 6. Turn on Low Power Mode

The Low Power Mode will help conserve battery life by shutting off services like automatic downloads, mail fetch, etc. Go to Settings > Tap Battery > Toggle on Low Power Mode.

Low Power Mode


When you find iPhone battery draining fast after iOS 15 update, you can try the solutions in Part 1 to troubleshoot the iOS 15 battery problem or adopt battery tips in Part 2 to improve your battery life. If you have any other idea, just leave a comment to discuss with us!