iOS 11.4 Battery Issues – Possible Causes
Battery Problems have been a constant topic regarding iOS 11 updates and the issues seem to keep coming. A while ago reports that iOS 11.2 was causing iPhone batteries to discharge extremely fast hit the news. Now it seems that the most recent update to iOS 11.4 triggers the next round of iPhone battery problems. One of the possible triggers is the update in combination with certain WiFi-networks.
Apple Support busy, batteries empty
iOS 11.4 was released for download at the end of May 2018 and soon afterwards the Apple Support forum was flooded with complaints about a noticeably shorter battery span after the update. Some users even reported up to 60 percent battery drainage over night. Others stated that their iPhone battery went down fast during standby mode, without actively using their iPhone, stressing that this issue was not present before updating to iOS 11.4. Another user reported he was able to fix the issue by downgrading to iOS 11.3.1 which further indicates the battery drainage as an issue caused by iOS 11.4. The battery problems affect iPhone 6, iPhone 6s and iPhone 7 users more than users of more recent iPhone models.
WiFi as the possible culprit?
So far it is unclear what is causing the iOS 11.4 battery drain, but some iPhone users reported they were able to fix the battery problem by deactivating their WiFi-connection. Some other users stated that resetting their network settings fixed the iPhone battery issues. You can find these settings in your “Settings” app under “General” and “Network Settings”. Once you have done a reset you have to re-enter all of your passwords. Some other users benefitted from changing from 5-GHz-band to 2,4-GHz-band. So far Apple has not issued an official statement or explanation, but there are a few beta-version available, so they are probably working on a fix for the battery drainage problem.
Learn more about your iPhone battery health in this article.