Apple may have created a problem with the latest version of iOS.
Since iOS 26 launched in September, there have been reports around the internet of the new update significantly shortening battery life, even on newer iPhones. For instance, one user on Apple’s support message board posted a thread at the beginning of this month claiming that their brand new iPhone 15 was impacted, and as they put it, the only possible explanation is iOS 26.
“Today, I was busy all day and did not use my phone from 8 am to 4 pm, 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 The screen was set to turn off automatically after 30 seconds, and automatic brightness was enabled,” the user wrote. “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 mode. So the fault lies solely with iOS. There are no excuses.”
iOS 26 is both the cause and solution to your iPhone battery problems
There are also lengthy Reddit threads about it. For example, in one thread, users with iPhones as old as the iPhone 13 and as new as the iPhone 16 pointed out they were getting several hours less of battery life compared to what they had before the update. User Responsible_Film_778, who has an iPhone 13 Pro Max, summed it up succinctly.
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“I have replaced the battery last year with Apple and it was exceptional with iOS 18.6. I was ending the day with 87% battery left with light usage. Now I’m lucky if it’s above 50%,” the user wrote. “It seems to consume the battery when scrolling through the Liquid Glass enhanced tabs or panels. Really disappointed with this update. I have 98% battery health but it acts like it has lost 1/3 of its capacity. Hopefully a new update will come soon to rectify the problem.”
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Naturally, you don’t have to go far on User @Digitalix complained that their iPhone 16 Pro is now only a “half-day phone” thanks to the iOS 26 update.
Of course, this hasn’t all happened without any kind of response from Apple. The company has a support page with information about possible battery life downgrades as a result of software updates. According to Apple, it might just be temporary and could go away on its own as the company makes further updates to iOS 26.
“Immediately after completing an update, particularly a major release, you might notice a temporary impact on battery life and thermal performance. This is normal, as your device needs time to complete the setup process in the background, including indexing data and files for search, downloading new assets, and updating apps.
New features are exciting and help you get even more out of your Apple product, though some may require additional resources from the device. Depending on individual usage, some users may notice a small impact on performance and/or battery life. “Apple continuously works to optimize these features in software updates to ensure great battery life and a smooth user experience.”
Users in the Apple support forum and Reddit threads also suggested some possible fixes, and Mashable previously wrote about the new “Adaptive Power” setting in iOS 26. It sounds like updating all of your apps. and then power cycling the phone helped some people, as third-party apps may not be optimized to run efficiently on iOS 26 right away. There are also other measures you can take, such as turning off ProMotion on higher-end iPhones or activating Low Power Mode.
Fingers crossed anyone dealing with this is able to fix it without sending their phone off to Apple for a battery replacement.
