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





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iPhone 15 Pro Max, iOS 18

Posted on Apr 1, 2025 1:09 PM

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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 24, 2025 8:57 PM in response to Katana-San

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. I took both devices to Apple. They got to see what was happening and said oh my gosh this shouldn’t be happening. We’re gonna wipe both these phones and they downloaded apparently new software. I have had nothing but issues with every single update not one of them fixes any bugs. It just brings new bugs so there’s no point in taking it to Apple. They don’t take responsibility.

May 25, 2025 6:43 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. I took both devices to Apple. They got to see what was happening and said oh my gosh this shouldn’t be happening. We’re gonna wipe both these phones and they downloaded apparently new software. I have had nothing but issues with every single update not one of them fixes any bugs. It just brings new bugs so there’s no point in taking it to Apple. They don’t take responsibility.

Hello~ I …on the other hand have not had any “bugs” whatsoever that haven’t been resolved. My experiences in dealing with Apple have all been positive and resulted in my complete satisfaction. The one and only time that I have had a hardware issue …my device was replaced.


~Katana-San~

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

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