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To resolve your device battery drain issue please visit this link: https://www.samsung.com/in/support/mobile-devices/samsung-mobile-battery-drain-issue/
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Samsung Customer Support
Hey Guys, I belief I found a simple fix for the extensive battery drain and overheating:
Prior the update, my S10 screen was set to 3040 x 1440 and after I faced the post update battery drain / overheating issue for almost 2 weeks now, I adjusted the resolution down to 1520 x 720 and then (because I disliked the quality loss) to 2280 x 1080. After I have done this, my phone stopped overheating and the extensive battery drains seems to be gone.
Couple hrs later I thought I make a test: I turned back to 3040 x 1440 again and interestingly the extensive battery drain / overheating have not shown up again!
So it seems, for whatever reasons, the Android 11 update mess up something with the graphics and that can be “reset” by switching the resolution.
Please try this approach and provide feedback here in the forum, to let me know, if you can reproduce the positive effect.
BTW: Don’t forget to press “Apply” button on the bottom once you changed the resolution setting.