Just last week, Apple officially pushed the iOS 15.4 version to users, bringing many new features to users, and the biggest highlight of this update is that the new version supports wearing masks and using face ID. In the current situation of frequent use of masks, the new feature has attracted many users to update the system. However, after the system update, many users said that the battery life of the mobile phone was greatly reduced, which was very dissatisfied. For the devaluation of the official version of iOS 15.4, Apple also responded.
It is reported that more and more people are reporting poor battery life after OTA upgrades. In serious cases, models with large batteries like the iPhone 13 Pro Max can only last for half a day. Models like the iPhone 11 use up 80% of their battery power in 24 hours, while the screen turns on for only 2 hours. In this regard, many users in China have reflected this problem on social platforms, and some users even said that they did not want to use the iPhone 13 Pro Max after updating iOS 15.4.
Apple iOS 15.4 system (image source from the network)
As for the depreciation of the new system update, some users speculate that Apple has begun to use the maximum 120Hz ProMotion refresh rate more frequently. That sounds plausible, but it can't be the full explanation, as only the iPhone 13 Pro and Pro Max have ProMotion, and these aren't the only models affected.
For such a problem, Apple said in the official forum that it has investigated the endurance crash problem raised by some users, and the final situation will be solved in the future.