Had my S21 ultra a week or so now, transfered all settings, files and so on from my P20 pro, dont get me wrong the P20 pro is a good phone!..but its not a Samsung😃
I'm back to Samsung also with my s21 ultra... last Samsung was note 9 which was a diabolical mess. exynos battery was *****. in-between my current device and note 9 was P30 PRO one of the best phones I've owned. now my s21 ultra is the best. they finally fixed exynos battery and it's amazing.
look at the remaining battery in status bar. I've not actually got below 40% at the end of the day and a lot of standby I'm guessing could easily get 8-9 hours of constant screen time. 120hz set adaptive and FHD+ RESOLUTION.