PSA: Maybe Wait to Install IOS 11.4 on Your IPhone
If you haven’t updated your iPhone to iOS 11.4 yet, you might want to wait a bit. It is reported that there is a bug in the latest operating system update that causes your battery to drain much faster than it did before the update. As noted by BGR , the thread on the Apple support forum already has 35 pages with iOS 11.4 users who feel like they are running out of battery.
While you can wait until Apple fixes any bug that might affect iOS 11.4, assuming iOS 11.4.1 doesn’t cause any other problems, you can also try installing the iOS 12 beta instead .
While installing a beta operating system on your primary device is almost always a bad idea, BGR says people who have made the move find iOS 12 more stable than iOS 11. The public beta also reportedly offers multiple batteries. life and productivity improvements for some users, which may be all you need if your iOS 11.4 device can barely survive a day on a single charge.