Yesterday i bringed my device to samsung service center( batterie drain 10 _12 % in the night without any use : turn off wifi, Bluetooth...and batterie very hot when I do video call or gaming). They believe their system more than the customer. They make me as a layer...they give me less than half price for my new note 20 to be able to exchange with another phone!!!! Last time that i bought item from Samsung.very disappointed !!!
If you Google it you will see that it is a real issue almost everyone with Exynos chip S20 and 21 is facing. Samsung service centers will do a reset and give you some advices how to reduce the battery redemption, which is not helpful.There is a real problem and they don't want to admit it.