We have already seen some speed tests of iOS 11.3 vs iOS 11.2.6 and now we have a video of some iOS 11.3 battery tests. In the video, which you can see below the battery is tested on the iPhone 5S, iPhone 6, iPhone 6S, iPhone 7 and iPhone 8.
All five handsets are tested for battery life on iOS 11.2.6 and then the handsets are put through the same tests running iOS 11.3. Will there be any improvements in battery life on the iPhones?
As we can see from the video the new iOS 11.3 has lower battery performance than the iOS 11.2.6 software. On the iPhone 5S it runs out 16 minutes earlier than iOS 11.2.6.
The rest of the handsets also show worse battery performance on the new iOS software, you can see a list of run times for the five handsets in the video.