For beta2, battery life got worse.
For beta3, battery life has creeped back to somewhat "normal" (yet could be better)
21 Ultra Unlocked here
I have a post in Tips:
Apps crashing on your beta - try this
... give it a go and see if it helps
Hello @dortyboy ,
Please check settings - battery and device care - battery- click on chart and see which app is consuming a lot of battery. You may try killing the app and see if it helps. We are aware of an issue with Google Play services consuming too much battery and have fixed the issue but didn't make it to last software update.
One UI Beta Team