iPhone 14 Battery Draining after update

There could be several reasons why your iPhone 14 Pro Max is experiencing battery drain after updating to iOS 15.3.1. Here are some steps you can take to try and fix the issue:

1. Check Battery Usage: Go to Settings > Battery > Battery Usage to see which apps are using the most battery. If you see an app using a lot of battery, try force-closing the app or deleting it and see if it helps.
2. Turn Off Background App Refresh: Go to Settings > General > Background App Refresh and turn off the switch to prevent apps from refreshing in the background.
3. Turn Off Location Services: Go to Settings > Privacy > Location Services and turn off location services for apps that don't need it. You can also turn off the "Precise Location" setting to improve battery life.
4. Reduce Screen Brightness: Go to Settings > Display & Brightness and turn off "Auto-Brightness" and reduce the screen brightness.
5. Turn On Low Power Mode: Go to Settings > Battery and turn on "Low Power Mode" to conserve battery life.
6. Update Apps: Make sure all your apps are up-to-date, as older versions of apps can sometimes cause battery drain.
7. Reset Your iPhone: If none of the above steps work, you may need to reset your iPhone to factory settings. Before doing so, make sure to backup your data to iCloud or iTunes.

If you've tried these steps and your battery life is still poor, you may want to contact Apple support or visit an Apple Store to get further assistance.

After an iOS/iPadOS or macOS update, your device will be running some background tasks for clean-up, re-indexing of Spotlight search, among many others. I personally notice the battery takes a hit for the first few hours, sometimes a day or two. This usually won't last longer than that so you might want to check back to see.

Your Mac might send you a notification saying "Optimizing your Mac" but the same is happening on your iPhone and iPad, too, after an update.

Also—doesn't apply to you in this case but—after a major OS update (such as from iOS 15 to 16), software usually isn't well optimized, AND the user tends to play with new features and drain the battery faster.

I had the same issue battery drain tried everything all usual turn off stuff. My battery was draining overnight when not in use on iPhone 14 pro max. Took it to Apple who ran a test and found camera module was failing causing drain. Phone was only months old. They put new camera/module in phone and phones as good as new. Charge at 100 overnight and when wake up still 100 percent. They said it’s a one in a thousand fault I have my doubts though. It wasn’t even showing up on battery usage. At end of day there shouldn’t be any battery drain on a phone that’s not that long on the market

Yes I tried all the usual procedures with battery drain restore phone getting rid of apps tweaking the settings. So I took it to the Apple Store where the Genius Bar performed a test on my phone and found it to be a camera module draining the battery as I slept. They repaired my phone the same day free of charge after all it’s a brand new phone under a year old and shouldn’t be performing the way it did due to their components. Hope that helps

Ken I had exact same problem as you if you read my replies from earlier I mentioned the camera module getting replaced as Apple did a test on the phone and found camera module was failing so they repaired it and my phones as good as new again. explain you’ve did all reset stuff etc and got rid of apps and updated to latest iOS before you go. and demand they run a diagnostic test as it’s their problem to sort the components that fail and is their duty to solve the issue. I was doubtful when they mentioned the camera module as I wondered how can that drain my battery but once they repaired the module my battery life Is as good as when it was new hope that helps and get to bottom of it. Cheers mention the camera module as they may not be aware of it or don’t want to be aware of it mines got repaired for free as it was under warranty period but I believe cost to repair on receipt was approx £182

Same problem. A full reset fixed it. Now my battery is still at 100% after being on overnight.

This worked:

Backup everything to iCloud.

Reset the phone to factory settings EXCEPT for your cell phone provider information referred to as esim. You'll get the option to retain esim.

Restore from iCloud. Restoration of settings is nearly perfect. For example, location sharing stopped working. I had to turn it off then back on.

Apple details the procedure. Follow it carefully or have an expert do it.

How to factory reset your iPhone, iPad, or iPod touch - Apple Support

Why don’t you try backing up and restoring?

The links to do this appear below:

Link for how to Back up and Restore: Back up and restore your iPhone, iPad, or iPod touch to your Mac or to iCloud - Apple Support

Link for putting iPhone in DFU Mode: If you can't update or restore your iPhone or iPod touch - Apple Support

Note: The above material is not my work. Any credit should go to Michael Brooks1  who originally posted it here: Jun 27, 2023 8:55 AM in response to Jubalub. 

Please report back wether performing the above process made the battery drainage worse, fixed it, or if you noticed no change at all. 

This is how I solved this issue. Go to settings, General , reset iPhone, reset all settings.

Following this, my battery drain issue was solved.

I use the iPhone 14 pro max.

Update your iOS to 16.6

I feel relieved. It has definitely fixed all the issue with battery draining along with overheating. They should have done it long ago, before my battery capacity being dropped to 95% in just 9 months. All that 9 months would have been saved by sticking to 100% battery capacity just like my wife’s 14 Pro since mine is 14 ProMax and a lot of people who had been facing with battery drain issue has been 14 ProMax.

Yes Genius Bar confirmed that it was camera module causing drain during the night my phone was ok during the day compared to when asleep since it has been repaired it doesn’t run any percentage down at night anymore and battery life is brilliant

I went for my appointment at most local Apple Store. They said the hardware diagnostic was fine- they reset the phone and basically said it could have been a weird issue with an app that may not have closed. Really nothing showing in the hardware; said to record any future issues and then it will have to be dug into as far as software. I’m satisfied with their service and will go back should it have continuing problems with battery drain

I’ll update if needed. Thanks everyone!

Who knows what battery drain was then but I did a factory reset myself before going to Apple and the battery was dying overnight when asleep. But Apple changed my battery module and it worked for me. At the end of the day I’m happy mines is sorted. After all my phone is coming up for 12 months old and battery is still 100% capacity after module repair

Hi JinWL!

Have you tired updating to iOS 16.6?

I’m happy to report my 13 pro max battery drain problem was completely resolved after installing 16.5.1(c) & I haven’t had any issues with 16.6. Back to only having to charge it at night.