iPhone can sometimes benefit from battery life increases when a new version of IOS is released, thanks to optimizations and the like. Exactly the opposite can also happen, with the changes Apple makes between releases, it has sometimes been less kind on the battery after an update.
How things are going to shake is far from predictable, and this is where YouTube channel iAppleBytes comes into play.
By taking an iPhone 5s, iPhone 6, iPhone 6s, iPhone 7 and an iPhone 8, the channel runs the popular Geekbench battery life on an older version of iOS, so the phones update and run the test again. The video starts with iOS 12.1.3 and then ends with iOS 12.1.4, the Apple release released to end the Group FaceTime error that was recently spoken about the city. The question of whether the update creates a real difference in battery life.
You can check the video for yourself to get your own conclusion, but our feeling is that the differences were so marginal, and so varied, that we can't really say there are differences between the batteries between the two releases. It makes sense to consider the lack of change of function between the two releases. The biggest difference was the iPhone 8, which got an extra six minutes of battery life when updated to iOS 12.1.4. During a full battery operation, there is no big difference.
It is an interesting test that sometimes gives some interesting statistics. This time, however, we are not so sure that there is much to take from this test round.
(Source: iAppleBytes [YouTube])
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