Overview

• A newly published support document says iPhones may run warmer and use more battery right after installing a major release like iOS 26.0.
• Apple cites background setup work such as indexing data, downloading new assets, and updating apps as the cause of the short-term impact.
• The company says battery usage and performance typically return to normal after a few days as post-update processing finishes.
• Apple cautions that some new, resource‑intensive features can cause a small ongoing impact on performance or battery depending on individual use.
• The guidance is framed as general advice for iOS and iPadOS updates, and Apple encourages staying current for new features, security fixes, and stability improvements.