galaxy note 20 ultra battery drain issue

Thank you for contacting Samsung KSA 

battery consumption will increase when you use certain features or apps , such as GPS,games, or the internet

so make sure to close all the apps after you finish using the device 

make sure that power saving mode is enabled

check the battery drainage for each app by going to settings-device care - battery

as you can put unused apps to sleep by going to settings-device care-battery-tap 3 dots -tap on sleeping apps -add the apps you want

also kindly visit the nearest service center 

the link of the service centers :

https://www.samsung.com/sa_en/offer/service-centers/

Hope you and your family staying healthy and safe!