Don't worry if your iPhone battery drains after updating to iOS 26

iOS 26 home screen. Photo: New York Times .

After 3 months of testing, iOS 26 was widely released in the early morning of September 16 (Vietnam time). In the official announcement, Apple said the upgrade may temporarily affect the battery life of the iPhone, but emphasized that this is normal.

Specifically, Apple's documentation explains that major iOS updates require a lot of background work, including indexing data to make searching, downloading content, and updating apps faster.

“Apple hardware and software are designed to deliver great performance and long battery life. As new features and improvements are added, they can change the way you use your device as you discover and take advantage of new features,” Apple said.

According to Apple, new features may require more system resources, with a “small impact” on performance and battery life. “Immediately after updating, especially with major upgrades, you may notice a temporary impact on battery life and thermal performance.

This is normal as your device needs time to complete background setup, including indexing data and files for searching, downloading new content, and updating apps,” the company’s announcement stated.

In the next section, the company notes that some new features may require additional device resources. Depending on usage, some people may notice a small impact on performance and battery life.

“Apple continuously optimizes these features in software updates to ensure good battery life and a smooth user experience,” the manufacturer's support document emphasizes.

In the past, users often complained about performance and battery life on their devices after updating to new iOS.

According to MacRumors , that may be the reason Apple wrote a support document to "reassure" users after the iOS 26 update. Although the impact of the software update on battery life is clearly explained, the company has not specifically mentioned battery life.

Apple’s documentation isn’t just for iOS 26, it applies to all iOS and iPadOS updates. In addition to the impact on battery life, Apple also emphasizes the importance of iOS updates, focusing on new feature experiences, bug fixes, and security enhancements. The company also categorizes and briefly describes the software update process.

Source: https://znews.vn/dung-lo-neu-may-hao-pin-sau-cap-nhat-ios-26-post1585687.html