It’s a shame that we don‘t have a huge pool of users to draw data from. There aren’t many people with non-updated devices with degraded batteries at all, let alone ones we can find, let alone ones with early enough versions to draw conclusions from. I’ve found two people here with a 6s on iOS 10. There are more, probably, but they aren’t easy to find, because there aren’t many.
That’s a little difficult for me to try because an LTE streaming test will use up all of my data, but I’ve tested it on the 6s on Wi-Fi (and on my iPads) and streaming video with the most used apps (Netflix and Amazon Prime Video) doesn’t seem to be any heavier than mixed usage. I get the same battery life I get while web browsing. That happens on both 9.7-inch iPad Pro on iOS 12, and on my iPad Air 5. As well as the 6s. So if that’s correct… maybe 6.5 hours of LTE streaming? 6 hours? I doubt it’s much worse than that. I will admit that I haven’t tried it, though, I’m only speculating.
