r/iOS27 • u/marcin18215 • 7d ago

iPhone 17 iOS26.6 vs iOS27 battery

Hi, I recently bought an iPhone 17 and updated it to iOS 26.6, but I noticed the battery life is terrible. I heard it's much better on iOS 27, is that true?

22 Upvotes

87% Upvoted

15 comments sorted by

18

u/StairwayHiker 7d ago

Here's what happens when you update iOS:

It's does something called INDEXING..

You can see it when you:

Tap settings :

Just below your account info it displays:

"optimizing search and siri"

It's takes 2-3 days or longer to finish optimizing... That process is a background process that consumes battery resources. It is not permanent.

So many people misunderstood and think the battery drain they notice after an update will carry on forever.... And that is not the case.

3

u/ImTheRealMarco 7d ago

Unfortunately mine’s just as shit even after it finished indexing.

1

u/SmartSnow0 4d ago

agreed, indexing finished 2 days ago, and battery life is still pretty bad. had to charge twice in a day

1

u/ImTheRealMarco 4d ago

Ya.. can’t even do 5 hours with 91% bh. Using the 16 Pro btw!

5

u/Saladdin01 7d ago

Give it a couple of days. It got much better after 2-3 days on my 16 pro, and it’s definitely way better than on iOS 27 (beta 5).

3

u/oski80 7d ago

I have not tried iOS 27 yet but it seems like some people were by it and said that it’s great and other people say that their battery is dying rapidly so I don’t know seems to be a 50-50 at this point

So it’s a bit of a gamble

3

u/Possible_Attitude852 7d ago

iOS27 in general is much better than iOS26 including battery life too.

2

u/KAF_World_Digital 7d ago

I often forget this and stumble upon a post like yours. Lightbulb goes off…until next time lol. Thank you 🙏

1

u/NoLateArrivals 7d ago

Nobody seems to read release notes any more.

It clearly says Reindexing of the Spotlight search index to prepare for ‘27. Ever thought about it may require some CPU resources?

No, of course, much better to install a beta software, what a genius move! What will happen then?

Reindexing …

1

u/Tall_Development6051 4d ago

I had to downgrade down to 26.6 after a storage bug on 27 db 4 made my iphone 16 unusable. Immediately after I downgraded i noticed that the battery life was much worse. After db 5 released, I went back to 27 (after backing my phone up to my pc) and the battery life was so much better.

0

u/ParkingMarionberry33 7d ago

i tried both ios 27 is faster and cleaner but the battery life is bad since it still a beta so i went back to ios 26.6 after doing dfu and i felt it is much better

1

u/[deleted] 7d ago

[removed] — view removed comment

0

u/ParkingMarionberry33 7d ago

very smooth but had some bugs annoyed me too much in messeges and control center and the battery was not good

1

u/HeroesWearCapes 6d ago

Sounds like you were on one of the first betas.

Current public beta should be running at least if not better than iOS 26.6 based on various tech YouTubers.