Battery Drain on iOS 26 and iOS 26.0.1.

Good morning everyone,

I would like to report a VERY SERIOUS problem with the battery and performance.

I have a NEW iPhone 15 with 100% battery capacity and only 22 cycles (which I did myself; when it arrived, it was at 0).

However, after updating to iOS 26 (and even with iOS 26.0.1, the situation remains the same), I continue to have VERY SERIOUS problems with the battery life of my NEW phone.

Today, I was busy all day and did not use my phone from 8 a.m. to 4 p.m., yet it still dropped from 90% to 45% WITHOUT DOING ANYTHING. No apps were open, the “Refresh apps in background” option was not enabled, the screen was set to turn off automatically after 30 seconds, and automatic brightness was enabled. So it's definitely not the phone's fault because it's BRAND NEW with a 100% ORIGINAL battery, nor is it the settings because it was in PERMANENT POWER SAVING mode. So the fault lies solely with iOS. There are no excuses.

I am writing this message to urge Apple to resolve this issue as soon as possible because, from what I have read on X, I am not the only one.

Has anyone else had this problem?

Thank you very much and have a good day.

iPhone 15, iOS 26

Posted on Oct 1, 2025 8:07 AM

Top-ranking reply

janithak47

Level 1

26 points

Posted on Oct 12, 2025 6:03 PM

Had the same issue on my iphone 16 after upgrading to 26.0.1.

i did these things and battery life seems to be normal. Following are the things i did.

update all the apps manually and do a hard reset by pressing volume up, release, volume down, release & finally hold power button until you see the apple logo. This will force your iphone to restart.
turn on reduce motion from setting. This will disable lockscreen 3d image feature. But maybe this helped to reduce my battery draining. (accessibility—> motion)
turn on the prefer cross-fade transitions(accessibility—> motion). This will disable modern transitions and new glass effect.

somehow these things prevented my rapid battery draining issue.

also please note that for first 2-3 days there are some background processes running to indexing after the update. So maybe that will also take a huge battery power for that process better to give 2-3 days and then try these methods. All or one will help you.

View in context

456 replies

Dec 19, 2025 11:01 AM in response to andrea_filice

Please help me update my iOS

sk8gal

Level 1

39 points

Dec 21, 2025 1:59 AM in response to lobsterghost1

Several charges later, it appears that the setting is being ignored altogether for both the iPad and the iPhone. It charges to 100% every time (unless I remember to check it and remove it around 80%)

sk8gal

Level 1

39 points

Dec 23, 2025 6:44 AM in response to Mac Jim ID

I did that two weeks ago. Everything is fine. This 80% battery charge limit is being ignored on both the phone and the iPad (the iPad is new). Something is amiss that is not specific to my devices.

muzckl1

Level 1

8 points

Dec 23, 2025 10:27 AM in response to Mac Jim ID

I updated well over a week ago and my battery is now at 79%. Before the update, my battery was at 90%. This is unreasonable.

sk8gal

Level 1

39 points

Dec 28, 2025 5:46 AM in response to sk8gal

I stand corrected: both devices finally stopped charging at 80% one time recently. The phone showed “x min to 80%” but charged past that many times prior. The phone battery drain issue continues.

Dec 28, 2025 11:33 PM in response to andrea_filice

you see the evidence here , that iOS 26.2 is a whole mess

Battery Drain on iOS 26 and iOS 26.0.1.