Is it normal that my iPhone 15 overheats and the battery lasts much less with the IOS18 update?
My iPhone 15, after updating to iOS18, has started with overheating and less battery life
iPhone 15, iOS 18
After an iOS update, it's common to experience an increased battery drain and increased heat as certain tasks related to the update continue in the background including indexing, you should only experience this increased battery drain for a few days before it goes back to normal.
⇢ If the battery in your iPhone drains too quickly - Apple Support