Increased battery drain is normal following a major OS update. Your phone needs time to complete the setup in the background. iOS 26 offers a new Adaptive Power mode to extend your battery charge.

Apple's iOS 26 update introduces a new adaptive power feature that's enabled by default, even on iPhone 17. Here's what you ...

Emergency Override lets you bypass the “liquid detected” alert and charge your iPhone in urgent situations, but using it ...

Apple overhauls the iPhone's Battery Settings page with an Adaptive Power Mode that will automatically reduce screen brightness or slow down some activities to prolong battery life.