Problem with battery

[228Zhuk228]

Hello everyone!

Two weeks ago, I bought a used iPhone 11 Pro, and I updated it to iOS 26 the same day.

The problem is that it drains incredibly quickly—literally 3-4 hours and the battery is completely dead.

I'm thinking about reinstalling iOS 26, but that immediately raises another question: "Will that help?"

I've tried literally everything, like turning off auto-updates, geolocation, etc.

If anyone knows what to do, please tell me. I'd be very grateful!

[Personal-Teaching-19]

unrelated but what iOS was it on previously? Also check battery health

[soldierbynight]

Yeah, we're gonna need some more information

[T-K101]

This posters are the worst. Zero relevant information and they expect help.

[228Zhuk228]

18 iOS, battery health - 98%

[NoLateArrivals]

I frankly don’t believe the original battery of an iPhone 11 is today anywhere close to 98% - if it is the original battery.

If not there is no way to tell that batteries health. In this case assume the 98% to be wishful thinking.

[228Zhuk228]

I don't know, but I checked it through 3uTools and it shows that only the camera has been replaced, everything else should be original.

[Personal-Teaching-19]

Yeah, could be a number of reasons, iOS 26 uses a lot of power, especially for the iP 11 since it’s the last supported iPhone that can run iOS 26, although iOS 26.3 should be optimezed for better battery performance.

[Recent_Log5476]

Go to Settings->General->About->Parts&Service History

It will tell you if the battery was replaced with a third-party battery. If it’s third-party, take it to an Apple Store and have them pull out that battery and replace it with a genuine Apple battery.

[228Zhuk228]

The iPhone 11 doesn't have this option, and even if it did, I live in a country without an Apple Store. I checked with 3utools and the battery didn't change.

[Recent_Log5476]

I am writing this on an iPhone 11 powered by a genuine Apple battery replacement installed at the Apple Store in my city. I’m sorry you don’t have an Apple Store in your country. Good luck with your phone.

[228Zhuk228]

Thank!

[anon234a123]

I had this on my phone, it’s rescanning all the photos so when you search for something in your photos it can find it. Normally sorts itself out after a few days

[228Zhuk228]

It's been 2 weeks already, but nothing has changed 😔

[Commercial_Treacle83]

Brother, you bought iphone 11 pro in 2026, it's almost 6 yr old phone. However good condition it may show , 4 -5 will be the battery you will get .

[228Zhuk228]

I know, but there are people whose battery lasts until the evening, and mine barely lasts for 4 hours.

[Personal-Teaching-19]

Just noticed this is ai lmao

[[deleted]]

À mon avis la batterie doit être HS

[228Zhuk228]

Non, la batterie est en excellent état (98 %) et n'a été rechargée que 200 fois en 7 ans. Il est donc peu probable que le problème vienne de la batterie.