You want a story about battery life? I shied away from the Samsung S21 because reviews said it didn't really have enough battery to last a full day of use. I got a S21 Ultra instead, which they said would finish the day with about 20%-30% battery left.
Upon my first rundown test, the damn thing went over 100 hours (4 days) and still had just under 10% left. I had to cut the test short and charge it because I needed it charged for a trip that weekend. It lasts so ridiculously long I cranked all the options up to full and removed a bunch of apps from power save (e.g. to get rid of the fraction of a second lag in the wallpaper animation when turning the screen on). It still lasts 3.5 days. That's what I thought this article was going to be about - how to stretch your phone's battery life to make it last 5 days without recharging.
These reviewers must be glued to their phones all day. Upon carefully re-reading those reviews, a few of them specified 6-8 hours screen on time. Holy !@#$. I only average 1-2 hours SOT per day - probably because my job requires me to not be staring at my phone, and I have a tablet and laptop for browsing when not actually mobile. Based on these numbers, I suspect if you turn your screen's brightness down all the way, and only use the phone only for essentials, you can probably push its battery life to a week between recharges.