Apple released iOS 15 to the world earlier this week and people have been installing it ever since. But as is the case with all of Apple’s updates, whether this one improves or destroys your battery life will likely depend on the model of iPhone you’re using. So how do you find out before updating?

YouTube channel iAppleBytes often sets about testing the latest updates across multiple devices so that you don’t have to, and that’s exactly the situation right here.

Battery life tests were conducted on an iPhone SE, iPhone 6S, iPhone 7, iPhone 8, iPhone XR, iPhone 11, and 2020 iPhone SE to see what impact the new software had. Check the video out below to see the full story.

This video was shot 24 hour safter iOS 15 Final was installed, so it had some time to settle in. I have seen many comments that it takes about a week for battery performance to optimize itself after an iOS update. I have always been skeptical of this statement as I have never personally had bad battery life right after I update. If I restore and download backup from iCloud well then that is another story. So I decided to run the battery test 24 hours after I updated them. In those 24 hours they were just idling with power connected. So let’s run the battery test again, and see if we will get some different results this time around.

We won’t spoil the outcome of the video for you, but it’s always worth remembering that battery life isn’t the be-all and end-all of these updates. Sometimes the new features these releases add to the mix are worth having to connect a charger a little earlier than otherwise might be the case!

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