I do confirm drain for no reason with my 14 pro. After the 16.5.1 battery consumption is there but for no obvious reason. i suppose it's from the new firmware. Before that i used to get 2 full days of usage and now 1 max....i tried everything but without success
I found the solution at least for my problem but I am sure that this has affected other users as well. Since the day of the new update I be been experiencing standby battery drain. I deactivated the call after serious crash option inside the emergency sos field. I never had issues before but as it seems there is a conflict there with the new update ….the phone returned back to its normal times. I hope this will help others 😋