iPhone battery draining after iOS 18 Update

Shocking! Same here I update two days ago and my batterie is draining hardcore as well! I just bought the new IPhone 16 Pro Max which arrived today ans my IPhone 15 Pro Max is loosing power like crazy now. Batterie Health is down 5% in two days. Has anyone managed a fix here?

I am supposed to sell my IPhone 15 Pro Max. Which now is going to be a time game! Please advise.

What you are saying is generally true, however in my case, it goes way beyond simple background file indexing. My horrific usage of battery is tied directly to the Calendar app. It appears it is stuck in a cycle of trying to synchronize. I finally deleted the app, which solved the problem. Hopefully, after a reinstallation, things will return to normal.

Try turning off apps that run in the background unnecessarily. To do this go to settings>general>Background App Refresh, and turn off anything that doesn’t need to run in the background. For example, a social media app, home manager app (Like apple HomeKit or Google Home shouldn’t be running in the background, but an app like Bose connect, Siri, An antivirus app, adblocker, weather app like the weather channel, or smart news needs to run in the background in order for it to work properly. In addition to this, you can also disable any ad tracking features by opting out of them in privacy and security. The last step is to disable unnecessary notifications. You can do this by going to settings>Notifcations, and turn off anything that doesn’t need to send notifications. (Again, same deal with background app refresh, anything like an antivirus app, weather app, or social media app doesn’t need to send notifications, but the phone app, FaceTime, and news or FaceTime and Apple Tracking notifications do so keep those enabled.

I hope this helps.

Thanks, Caleb

Same to me, once I upgrade IOS 18, my phone battery drop a lot, even during I sleep, 2nd day wake up, the battery drop a lot, before upgrade, I no need to charge my phone during working,(I very less use phone during working), but after upgrade I need to charge it during working 🤦🏼‍♀️🤦🏼‍♀️🤦🏼‍♀️, regret to upgrade 😔，Apple, pls help to expedite resolve it. Thanks

Ios18 public is killing my battery Something way off! Was a beta user not really a problem but since the public release half a day at best out of battery never had a problem lasting a day in ios17! Having to use power save mode from 100%! Any ideas?

I am also having the drainage issue after updating to iOS 18. What I’ve looked at is my background app refresh. You can turn this option off for each app running in the background. Settings>Apps (Apps is at the very bottom) There is also a setting called Clean Energy Charging. I’m going to test that too. Hope one of these options may help you. I’m in testing mode right now.

same...my iPhone 15 draining very fast especially when i have data mobile...i have install it from the very first day...waiting a couple of days if improves or waiting for 18.1... but for now my battery remains with 100% and 44 cycles since june the month that i bought the iPhone...

It's the same scenario but with the iPhone 13 mini this time. Should we downgrade the system to stable version 17 or wait for the patch that solves the problem with battery drainage, especially for slightly older devices for which AI doesn't work and only poses a real strain?

Thank you!

I purchased my iPhone 16 pro on Friday. Battery is draining super fast, around 1% every 2 minutes of just general texting! Run diagnostics with apple support who say there is not issue. iOS 18 wanted to update again even though I am already on ios 18. Someone mentioned waiting a few days to see if it ‘learns how I use my phone’ and see if it improves. I replaced this phone due to poor battery on my 14 pro max and I’m seriously unimpressed.

Mine is also draining rapidly, I updated to iOS 18 and now my battery doesn’t last that long. It took like 1% of my battery life. My phone was at 70% when I woke up (around 9:30am) but it just turned 10am like 20 minutes ago and now it’s at 50?? Hopefully they fix this issue soon.

I watch my battery drop from 89% to 83% over 30 minutes of just looking at the settings of the phone. Also had to put the phone down about 15 or more times as the phone is getting hot.

just for the record this is a new iPhone pro on most current iOS 18.

After updating to ios 18 my iphone 15 pro battery is draining very fast and have to charge like 3 times a day. And even just after the update restart the battery health reduced from 100 to 90 ..mine is just 6month old phone ..@Apple team please fix this immediately

Yep, I have a 12 Pro Max, since iOS 18 I too have notice significant battery drain.

I don't use my phone that often and I'm not a heavy camera, Youtuber, TicTok or X user.

No dont iOS 18.01 or 18.02 will correct yet another Apple SW error.

I have a dramatic battery drain after updating to ios18 too, this on iPhone SE and iPad. The iPhone SE empties itself totally not being used in less than a day (!) and the iPad looses 20% just sitting here with cover closed. For some OS that brings only few new functionality this is understandable. This already happened in the past but obviously Apple did not learn from it.

I have been using iPhone 12 since the day of its release. before updating my device to iPhone 12, I had neither issue with the battery draining too quickly nor my device heated and saw heating warning on my screen. 2 days into updating my device to iOS 18, I am facing the heating warning and my iPhone is not charging more than 30%

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