Apple has begun rolling out iOS 26 to eligible iPhones, and the company is already preparing users for some changes they might notice right after installing the update.
According to Apple, battery life could temporarily take a hit, and phones may feel warmer than usual in the first few days.
This happens because major updates trigger a lot of background activity. Once the software is installed, the iPhone begins indexing files, reorganizing data, updating apps, and syncing new features.
All of that work runs behind the scenes, using extra power and generating more heat. Apple says this is completely normal and that performance should settle once the background processes finish.
For most users, the battery drain and heating should last only a short while. Typically, within a few days of installing a new iOS version, the phone goes back to its usual behavior. Still, Apple has warned that the experience can vary depending on how the device is used.
Some of the new tools in iOS 26 are more resource-intensive, and heavy use of these features could affect battery life more noticeably. That means if you are exploring the new capabilities extensively, your phone might feel different for longer than just the initial adjustment period.
Apple has promised to fine-tune performance in upcoming updates, which should help balance out power use over time.
While a dip in battery performance or a bit of extra heat right after updating is expected, Apple has insisted that this does not mean something is wrong with your iPhone.
Instead, it is part of the normal settling-in process as the phone adjusts to the new operating system. Users are encouraged to let the update finish its work before judging overall performance.
