iPhone 13 Battery Drain Overnight

iPhone 13 overnight battery drain. I slept at 11pm at that time the battery percentage was 25 to 30 percent but at morning 6.30 the phone battery was dead

hi bro, this is a problem. during idle time battery graph drain was continuous. whats current battery health percentage of the device?

Current battery health percentage is 89

The phone was bought on 22.09.2022.
And today only I switched off the optimised battery charging.
I use two phones so I haven’t done any intensive task like gaming in my iPhone even I haven’t watched movies in my iPhone.

ok bro. do one thing. perform “Settings - general - reset - reset all settings” once. then come back to settings - general - background app refresh, and turn it off. observe for two to three days and share the screenshot or details how it goes.