Since this screen is a 1000 nit, could it be the auto brightness settings are up way to high, and thus much higher battery use. As far as i know, the clocks on the 855+ are a result of binning, so same voltage with those clocks, unless that is inaccurate?
watching this vid, with what he says is equalized brightness
he manages to get 3+ hours of pubg, along with youtube etc, for 8:46 of SOT. Now as i have a 6T this is pretty appealing, but reading a lot of reviews, it seems 5.5 to 6 hours is the average and i wonder is that because of having brightness wayyy up, if the slider isnt balanced, or rather linear. 50% could be 500nit, which is max brightness on a lot of other screens. Thats 45nits brighter than max on a 6T for example. Just trying to sort out the discrepancy, between this gaming test, and what reviewers are getting. I cant imaging 4g modem is that big of a difference.
In terms of battery life, the 7T put in 8 hours and 47 minutes of work in Tom's Guide's custom battery test, where phones endlessly cycle through websites at 150 nits of screen brightness until they run out of juice. Decent though that is, that's not only worse than the OnePlus 7 Pro (9:31); it pales significantly when compared to the iPhone 11 (11:20) and Samsung's Galaxy S10 Plus (12:35).
this from Tom's hardware seems to rule out over bright theory as they control nits to 150, but that seems crazy compared to the gaming vid we see above that shows a mere 45 mins less while streaming video and 3+ hours of pubg. It can't possibly be as demanding to refresh a web page at 150 nits. Judging by the video as well brightness looked easily over that level. So guess we'll have to wait for the IRL user reports