iOS 15.4: Weak battery after update – Apple reacts

A changed power saving mode of iOS 15.4 is not the cause of shorter battery life, Apple explains.

With iOS 15.4, Apple has changed the power saving mode that has been available for a long time. This should actually increase battery life, but iPhone 13 Pro and iPhone 13 Pro Max owners in particular complain about the opposite. In the new power-saving mode for iOS 15.4, Apple reduces the refresh rate from 120 Hz to 60 Hz. In addition, 5G is deactivated and data connections run over the slower LTE network instead. However, if large downloads are initiated or videos are streamed, the iPhone does not deactivate 5G. In addition, iOS 15.4 turns off the display after 30 seconds and generally reduces the screen brightness. The automatic synchronization of photos with the iCloud is also stopped, new e-mails are no longer retrieved and apps can no longer update themselves in the background.

Angry users

For some users, however, these measures still lead to the fact that the

iPhone battery drains faster
. Partial is from one

halved runtime
the speech. Even a restart does not help in these cases.

Reindexing in the background

Such complaints appear almost reliably after a new iOS version. However, users should keep in mind that a reduced runtime after an update can also have other reasons. The re-indexing of frequently used apps in the background after an update causes more CPU load. Once this has been done, the battery runtimes you are used to before should return. Alternatively, users can also do without installing the update for the time being. An update to iOS 15.4 is not necessary for daily operation. However, the update brings numerous innovations such as unlocking the iPhone via Face ID when wearing a mask or new emojis. In addition, Apple closes numerous gaps in every update that could sooner or later be exploited by criminals.


Update: Apple speaks out

After the update to iOS 15.4, which brought a lot of functional changes, including the iPhone’s energy-saving mode, complaints about quickly emptying batteries rained down again. This phenomenon has less to do with the new functions for saving energy, but occurs again and again after updates when various functions and apps on the device have to be readjusted and consume more power than usual. The same applies to iPadOS and macOS on MacBooks, but it will be less noticeable there and will never become an outraged topic discussed on social media.

In a rare moment, Apple’s support tweeted about the issue, explaining the phenomenon, and offering to contact them via direct messages if the problem persists.


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