Got a massive battery drain with iOS 26. iPhone 15 pro here. So have gone back to the previous version for now. But!
I did like what I experienced. I had no complaints at all really.. other than it felt slightly sluggish to iOS 18 which is to be expected, and the battery drain issue.
One question regarding your iPhone 15 Pro. Either on iOS 18 or 26 have you noticed, by any chance, that your current device gets hotter than previous iPhone models?
I’m interested in getting one some day, but I’m not sure wether it gets too hot or has battery issues (due to this higher temperatures).
Good morning everyone! 🌅
I wanted to share some thoughts about the battery life and heat issues we’ve been experiencing with the beta versions of our iPhones. It’s true that many of our 15 pro beta testers are seeing more battery drain and heat than our 16 pro and iPhone 16 beta testers.
I noticed that most of us who own the same iPhone as me and the iPhone 15PM beta testers have been experiencing heat issues quite often when we don’t use MagSafe. I’ve even seen my iPhone drop to 20% more often than usual, and I always carry a MagSafe power bank with me when I go out for a long time.
It’s definitely uncomfortable when our iPhones experience this kind of heat with beta iOS versions, especially in the initial builds.
But what about older iPhone models (before the iPhone 13)?
iPhone 11 to 12 users- How does it feel like on your iPhone if you’re using this beta version? Is the heat even worse, especially when the processor is throttled? I’ll also try to find out if there’s any underlying reason why the processors are playing a role in this situation.
Functionally beta1 has been very solid on my 16pm. Apps work, performance is good
I’m seeing good low battery drain whilst idle/overnight. However when using.. for example browsing social media on a train trip currently, the phone gets far too warm and battery drops off rapidly.
20 mins podcasts (Bluetooth, screen off) then 25 mins pixelfed/bluesky etc has caused battery to drop from 90 to 78 which is crazy bad
Phone is hot… to the point where I will stop to avoid overheating. Ambient temp in the train is around 21C
With a holiday coming up in a week it will be a case of seeing how beta 2 is but probably back off
I do have the adaptive power option set so will turn that off in case it’s buggy. It does seem as if cpu power management may be the issue here
Cellular networks can indeed accelerate battery drain and demand significantly more power, which generates more heat. You’re right; power management from the CPU and the A18 chip plays a crucial role alongside the modem itself. I’ll bring this up to my friend, an ex-Apple employee and Marines vet who can provide insider insights.
If I plan to use my iPhone frequently, I might try adaptive power management, but it could slow down the device, so I’ll probably skip it.