(Copied from another thread) S9 Exynos here.
Second full day (after a half day when I got it) and it's been pretty horrible. I expected it to be average or not great for the first couple days, but this is nuts.
I've got everything on - location, sync, AOD, Bixby, etc - and am losing about 5% per hour with the screen off. Ending the day on 15% with only an hour or two of SOT.
Will be keeping a spreadsheet log of it, including what services are on and how I've used it, so will report back. Hope it improves naturally with everything on though. Reception is also surprisingly average; in the bathroom at work my Pixel 1 had decent enough reception to load videos, but my S9 seems to struggle to even load images. Pixel 1 had 3G in an underground pub, but my S9 couldn't get any data at all.