battery draining after iOS 26 update on iphone 15

Have to be honest this is all nonsense. I updated 9 days ago now. I keep my phone on the charger at home with WiFi all the time and I’ve done everything all these videos have said about saving battery. Nothing has worked and nothing has gotten better. My battery drain is ridiculous. I have an iPhone 15 pro max that is about 15 months old I haven’t even finished paying it off yet. So the whole give it 3 days to a week to index is not true.

what’s the deal. When is Apple fixing this battery drain bug?

Hi Jim.

first off thank you so much for the reply. And lengthy I really appreciate it

however to say it’s not nonsense when it’s LITERALLY happening to my phone I don’t know what to say.

as far as comparing daily useage with the battery is irrelevant. If it’s all equal since the update but it’s plummeting way faster than it did on iOS 18, then it doesn’t matter because it’s horrible now

i did the hard reset it seems to have helped just minimally. Not great but a TINY bit

lets just all keep our fingers crossed for 26.0.1 to come out ASAP to fix this glitch which I hope it does

Livitnluvit wrote:

It if my photos live in the cloud, why is it indexing the files on my phone?

They certainly do not live in the cloud when using iCloud Photos, they are just being synced. You still have a copy of those photos on your device and when using Optimized storage, your device can keep a lower resolution of those photos to save space when needed. If you delete any photo on your device, it will be removed from iCloud. The same is true if you delete a photo from iCloud, it will be removed from your device.

With the object detection being done on those photos, you can ask Siri to show you the pictures of trees, for example, and since they have been indexed, you will see those photos.

Deejjjjjjjjjj wrote:

Hi Jim.

…

i did the hard reset it seems to have helped just minimally. Not great but a TINY bit

lets just all keep our fingers crossed for 26.0.1 to come out ASAP to fix this glitch which I hope it does

Hard resetting (whatever that is) may remove indexing and extend the problem time scale.

This was all covered in my first response to you with a link with things to try.

I am reverting back to IOS 18.

This was possible during the beta test period, but if you have installed the official release version of iOS 18, you can't go back to iOS 18 using any method that Apple supports.

Even if you could, you would still need to have made a special "Archive" backup on a Mac or PC while the phone was still running iOS 18......before....you switched to iOS 26.

Don't be fooled by any nonsense about IPSW files that you might see on the Internet.

I have purchased my iphone 15 on 23/09/2025 i.e. few days back. And just two days back I updated my device to iOS 26 after the update my battery is draining to fast even when I'm not using the device. Please provide me a resolution.

Hi since updating my iPhone 15 pro max to iOS 26 my phone will be on 76% then turn off and when comes back on I’ll only have 10% or so battery then before I get to put my password in my phone switches off how do I fix this

I wasn’t aware iOS background tasks aren’t tracked in the battery monitor, any chance you can share the article that discusses this? I’m interested to learn more.

iPhone 15 battery draining so fast after updating IOS 26

Apple should do in this regard soon

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It if my photos live in the cloud, why is it indexing the files on my phone?

Hi , do you mean that, after upgrading to iOS 26, the battery drain very fast? Actually, I am still considering, whether or not to upgrade to iOS 26 or fix at iOS 18.

There’s optimized photo versions stored locally on the phone, I guess it indexes those

I am reverting back to IOS 18. My battery drains super-fast. I have done all the settings changes recommended to help with battery life. I can't even get a whole day with light phone use.

shabeer57 wrote:

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We'll need a tad more detail.