iPhone battery draining after iOS 18 Update

Hello~ What iPhone model, iOS and battery health in your specific case? Just in case…

Check the iPhone battery health and usage - Apple Support

~Katana-San~

Well since I made the update I have been having the same problem. Now in order to use my phone like normal I had to put my phone in the “Low Power” mode. It seems to be working for the moment.

I am using iPhone 13. Hot an update to upgrade to IOS 18. After successfully upgrading the battery is draining like water flowing from tap. 20% drained in less than 5 mins.

it will be great if a fix can be provided to stop these unjustified battery draining and health.

If this is your strategy to upgrade the iPhone 13 to a new model then I think it’s not great way of doing such act.

IP 15 Pro Max here,

Before the iOS 18 update my battery’s health was at 94%, now it dropped to 90% within a few days. Not to mention the fact that even before I was extremely worried that I lost that 6% of the battery’s since last year when I got the phone, it kept draining the battery’s health way quicker than I had anticipated, now it is just horrible. I’ve updated to iOs 18.0 on the first day of it and since then I’ve been losing approximately 0,75-0,8% of my battery’s life a day. I am really concerned about the whole thing, this being my first Apple device too. I’ve tried everything such as: closing apps refreshing in the background, freeing up some storage, low power mode, constant and universal charging. However nothing seems to work, I’ve seen others having the same issue and I’m asking myself what is going to happen to the battery’s health after 18.1 . Will it go back up? Or we just have to replace our batteries or even our phones? I saw someone saying that we’re literally counter-clock through this whole thing. Forgot to mention that I’ve kept my charging limit to 80% since I got the phone. Not even to bring up the fact that a full charge doesn’t last me 12 hours on moderate usage.

What should we do???

Unfortunately crazy battery drain happening for me as well on iPhone 16 pro. Still not solution. 

I tried everything. I’m quite not new on iOS and I didn’t find any solution. Avoid common comments please. There is no app working in the background acting wired. It’s just some sort of process working in the background and draining battery even when not using iPhone.

Background activity off. Most of the commons draining tasks off.

I’m comparing my activity to my previous iPhone 14 I have to my girlfriend. She is at 78% while I’m at 45%. Something not going right here.

Restored one time and solved nothing. I would like to avoid restoring everything and not using iCloud backup to be honest.

iphone 16 pro on iOS 18.0.1

Same issue of battery drain. Specifically, 6mins of activity on the home screen was recorded every 1 hour as per the battery usage data. This drained about 30-40% of my battery overnight.

Also per the battery usage data, over the last 10 days, 34% of all battery usage was on the Home screen.

Anyone else see that the main culprit is Photos background usage. Mine is hitting 75% in the background. I upgraded when it first came out so it’s been a month now. Only thing that helps is turning the phone off when I feel it getting warm.

I've read the attempts of others (nothing helps). It seems that in my case, the battery drain is most likely caused by the modem.

I put the phone in airplane mode, and the draining stopped. So, basically, I have a phone that I can't make calls with, and if I want to make calls and use it, I constantly have to recharge it.

Hello~ That’s well within the normal degradation of an iPhone battery. Click on below and review…

iPhone Battery and Performance - Apple Support

Also this user tip written by *Lawrence Finch* has much helpful information…take a look.

When to charge your iPhone or iPad - Apple Community

~Katana-San~

Apple support will help you like this: There is no issue with ios18! just replace you battery or buy a new iphone duh!

I removed facebook app and it solved the problem. But this solution does not fit me. I’m downgrading to ios17 and never updating again. They are just doing this on purpose so you go buy a new one.

Hello~ Let Apple know…

Product Feedback - Apple

~Katana-San~

Hello~ Are you charging your iPhone overnight?

If the battery in your iPhone drains too quickly - Apple Support

~Katana-San~

It's quite typical of Apple to introduce a new iOS system (like ios 18 which i also downloaded....SILLY ME) and not have done enough testing and intern we all suffer the people that buy their products.I can no longer add an email account to my Mail app which they are investigating and the battery drain is horrendous. It was 100% this morning when I woke up. I've left the house now not even one hour and it's drained to 77 and I've hardly used anything. .

Apple are becoming a horrible company that do not care about their customers who make them rich

Issues started with iOS 17.5xx and continued with iOS 18. Battery is dying in front on my eyes even if all “hacks” to reduce battery consumption have been applied. Worst of all I had 98% battery health (maximum capacity in my 14 pro max) and almost one month after faulty upgrades max capacity went down to 94%.

Thank you apple…

This issue is not unique to the iOS 18 update.

I’ve noticed that battery life gets impacted every single time have updated the iOS on any of my iPhones I have had since iPhone 1. This is especially true if the update coincides with the launch of a new iPhone model. Even when I have paid to have the battery replaced, it doesn’t seem to help the issue