Why is my iPhone battery draining fast after iOS 18.4 update?

Since i update ios 18.4 version my device battery very fast drain to much , please anyone who know how to fixed this bugs





[Re-Titled by Moderator]

iPhone 15 Pro Max, iOS 18

Posted on Apr 1, 2025 1:09 PM

Reply
Question marked as Top-ranking reply

Posted on Apr 4, 2025 8:09 AM

It was the mail app for me running in the background consistently even with background app refresh off. It was showing an hour by hour usage in the background ( thats a full hour of working in the background and minutes on the screen ) when it should be minutes in the background. The only fix I’ve found after a fresh install of iOS ( this didn’t work ) was to delete the mail app and use a different mail app and this is now working correctly with minutes in the background. This isn’t because of it’s “an update so the iPhone will be configuring in the background and power and thermal performance might be affected” this was something else. Oh and my iPad doesn’t have any issue at all.

48 replies

May 25, 2025 6:05 AM in response to Shefishes2

Shefishes2 wrote:

Two years ago when I was having issues after an update on my iPhone, where it started just randomly capitalizing didn’t understand the context of a sentence when it did before I updated my iPad about a month later, and it did the exact same thing.

You are talking about an issue from 2 years ago. While having bugs in software is inconvenient, it is part of software development in any platform and has been the case ever since the first computer. With every update, and now currently at 18.5, there is a list of bugs that has been fixed on the update page, so the accuracy of your statement is considerably reduced when you say "with every single update not one of them fixes any bugs". By relying on that statement to make the conclusion that "there’s no point in taking it to Apple" is nonsensical.


You should certainly do whatever makes the most sense for you, and there are many options. The update to 18.5 has been the most stable for me. I agree with Katana-San, who you replied to, that the user should take the device to Apple for diagnostics if their issue was not resolved with 18.5. This is particularly beneficial when they do not want to post screenshots of the battery graphs and app usage to help visualize what they are seeing.

This thread has been closed by the system or the community team. You may vote for any posts you find helpful, or search the Community for additional answers.

Why is my iPhone battery draining fast after iOS 18.4 update?

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.