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iOS 27 battery life thread.
- Thread starter goldmac2006
- Start date
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makoru
macrumors regular
I have an iPhone Air, I think that from what you say, I'll better wait for more stable betas in battery performance...
Sorry, but this whole thread is nonsense. Beta versions do have several features enabled, not only a single indexing round, but reports and data collectings which support the developers finding bugs. You cannot estimate half way battery consumption for final release with a beta release.
FeliApple
macrumors 601
The thread always starts when the beta is released and continues when the final version is released.
vbctv
macrumors 65816
Yes we know debugging and alot of other stuff are enabled, but those of us who run betas all the time, can get an understanding of how battery life will be. Debugging and those other things do use a small fraction of battery and we know that. This thread is also to help those who may want to install the betas themselves or help them decide not to...
FeliApple
macrumors 601
What @vbctv said, AND one more important thing:
When the beta process is reaching the end, there is a crucial piece of information that these threads provide: whether battery life and/or performance are good or not. Apple has given about a week to downgrade in the last two major releases. That’s not enough time to judge it by yourself, especially if you choose not to update immediately.
Most people don’t use this information and update anyway, but perhaps it can help some people on the fence.
With iOS and iPadOS 26, several threads that were active during the end of the beta process repeatedly warned that battery life had been significantly worsened, by 15 or 20%, vs iOS and iPadOS 18, and that there were noticeable perfrownde issues. This helped many people who chose not to update. Liquid Glass was the main reason in most cases, but this helped further cement the idea to stay behind for many.
Were these threads not available, people wouldn’t have the information. Discussion is always beneficial even if conditions in this case aren’t absolutely favorable.
This time, many have reported a similar battery life vs 26, which is important after devices suffered significantly with 26 vs 18 last year.
Correct y’all. The truth is that we want to see how the drain differs as indexing capabilities and how Apple Intelligence + now with Siri AI, is contributing as a coefficient to battery deviations in both battery life and battery health. In essence, battery performance and time to use from charge limit/100% to the lowest point.
Logging is also another factor. If your iPhone on iOS beta runs analytics, diagnostic files for developers and the Apple engineers 🧑💻 to take a look at, then that pulls more battery as it gathers everything that is going on in every app.
My iPhone stopped indexing 4 days after the beta 1 was installed- 2 days after I got off the Siri AI waitlist.
Posting this thread now is a waste of time. THIS IS DEVELOPER BETA 1. It will not be stable or have good battery life, that's why it is a beta. You even admit this later:
No-one who cares about device performance or reliability should be installing this: the only people who should be installing it are developers with a spare test device.
Séamus Boyle
macrumors regular
If it’s such a waste of time, why are you bothering spending your time posting in it?
Last year and other years there are threads like that. There’s no reason why you should be saying things against it.
Even there are public betas too, and betas aren’t just limited to developers. Folks who want to try the new features early before September do that too. And some don’t have the mileage to spend another grand or two to own two iPhones 📱
Focusing on battery life for betas as a whole is pointless. Unlike public releases, you only stay on a beta for a week or two.
Bugs get fixed as the cycle progresses, but battery life is still unpredictable, so you can’t really use any beta as a reference either. So, what's the point of talking about battery life on a beta version you can’t really stay on?
EDIT: It's fun to talk about but in the end it only makes sense on public releases.
Bugs get fixed as the cycle progresses, but battery life is still unpredictable, so you can’t really use any beta as a reference either. So, what's the point of talking about battery life on a beta version you can’t really stay on?
EDIT: It's fun to talk about but in the end it only makes sense on public releases.
Last edited:
These threads ain’t limited to Betas. They are open year round so folks can get the hang around with the difference between each build, public or beta.
Radeon85
macrumors 68000
27 is performing better overall than any of the 26 officially released updates, damn impressive for a B1. It took multiple 26 betas to get that to run smoothly when I tested that.
I’m not a developer at all, and I’m happy to run this on my only daily driver and help report any issues with the feedback app. If people wish to take the risk and install these things, then that’s their choice.
The more that test these updates and hopefully give feedback, the better. I’d rather millions test it than a few thousand or hundreds of thousands of just devs.
I am a developer and an engineer. I recently started interning at an electrical engineering company focused on batteries and solar power. Although my background in iOS beta testing began at the outset of iPhone ownership, I first tried iOS 11 during the public beta program’s initial launch. I consistently run betas on my daily driver to become familiar with new features early, avoiding the cost of a secondary iPhone. However, some people uncomfortable with testing on their primary device use an iPad they rely on less frequently if they ain't have a secondary compatible iPhone . My friend tests betas exclusively on his iPad Pro M4 while keeping public builds on all other devices.
Yeah no kidding. It’s an early developer beta 🤣
makoru
macrumors regular
FeliApple
macrumors 601
That’s a little funny to me, I never update anything, only getting a newer iOS version when I upgrade the device itself, which isn’t really a frequent occurrence.
I have jumped several iOS versions (from iOS 12 on my Xʀ to iOS 18, my current, on my 16 Plus), and to be honest… yeah, sure, I’ve noticed some features, but (and maybe this is just me), 99% of the features they release are irrelevant, I use them so infrequently that if they weren’t there I wouldn’t care.
If compatibility allowed me to use iOS 12 as a main iOS version, I honestly don’t think I wouldn’t be missing too much.
And with the iPad? Even worse. I use it for content consumption, which means that the apps I use are limited. TV shows, sports-watching apps, note-taking apps like Pages and Notability, etc. I don’t think I’ve bronces a single feature difference between my iPad Air 5 on iPadOS 15 and my 11th-gen iPad on iPadOS 18. They’re probably there if I check, but I haven’t noticed.
I had the iPhone 6s and the 9.7-inch iPad Pro when they were current on iOS 9. I got them at the same time. I distinctly recall thinking that “this combo works so well that I’d be able to use this on iOS 9 forever if developers gave me compatibility”. A decade later, the only reason for upgrading would be the full-screen design and battery life on my iPhone, but if compatibility allowed, give me an iPhone 11 on iOS 13 (for camera features), and a 3rd-gen iPad Pro (A12X) (2018) on iOS 12, and I’d be just as happy, honestly.
Obviously in practice I wouldn’t be happy because I can’t use iOS 12 and 13 as main anymore, I’d have to have them updated and I wouldn’t be happy if that’s the case, but otherwise? Features are neither relevant nor noticeable to me. Press me a little, and I’d say that as long as my devices work the way I want them to, hardware upgrades are also irrelevant.
Why do you choose to pollute the threads at each iOS version when you don’t update?
You have one unproven theory and keep repeating the same thing year over year constantly. I’m trying to understand what you’re really aiming to achieve here with these same repeated comments every year about your Xr.
FeliApple
macrumors 601
I was talking about noticing features, which is what Goldmac mentioned, clearly.
It was about software features, not compatibility for obsolete hardware.
Please let the thread be about iOS 27 battery life and don’t derail this like you did others with complaints about compatibility and devs.
FeliApple
macrumors 601
Exactly. That’s what I was talking about. “Some people use secondary devices for betas and I like betas for features”.
And I said “the perception difference is interesting to me, as I generally jump between several iOS versions and in practice, I notice nothing”.
This is my final reply to you on this, it’s not relevant.
Travis299
macrumors 6502
IOS27 on 15PM with Siri 2.0 & indexing complete battery seems to go down much faster.
New Siri is great IMHO!
New Siri is great IMHO!
Travis299
macrumors 6502
vbctv
macrumors 65816
Still indexing after 9 days. iPhone Air, battery life is god awful so far. Getting worse by the day. Within 2 hours I go from 100% to 65%. As I said the battery health has gone from 100% to 99% during this indexing time after 225 charge cycles. And I'm having to put on the charger 1-2 times during the day now. Never had this issue before, but I do feel battery life on the Air has gotten worse every 26.x update and now 27 beta is the pinnacle of terrible battery life... Hopefully it gets better and we get the promised 10-12% better battery life as iOS 27 is promising (but doubt it)...