Dear Samsung member,
Greetings from Samsung Customer support!
Be assure below steps will solve the issue related to battery drinage :-
1) Perform Battery Optimisation:- Settings > Select Device Maintenance/Device Care > Optimize > Optimize all options like Battery, Storage and Memory,
2) If issue has not been resolved then turn off bluetooth, Wi-Fi, mobile hotspot, NFC etc,
3) Kindly check whether mobile network fluctuates frequently or network signal is low in your area. In both cases battery will drain considerably fast.
4) Kindly set the device display brightness in auto mode (If available).
5) Screen timeout settings:- Settings > Display > Screen timeout > Select minimum screen timeout
If issue still persist please do send the log file via, Samsung member > Get help > Send feedback > Error reports > Select Symptom category. So that we can provide you the better assistance.(Note:-You are requested to send it within 15 minutes of problem occur).
Thank you for writing to Samsung.
Samsung Customer Support