If your iPhone's battery drains quickly and the charge doesn't last long, you don't need to worry anymore; simply change ...

If your iPhone battery drains faster after updating to iOS 26, wait 24–48 hours for background tasks to settle. Then update to iOS 26.1, restart your iPhone, check and update battery-draining apps, ...

Apple confirms iOS 26.1 battery drain is normal and temporary as iPhones complete background setup tasks after the update.