I have faced overnight battery drain used my iPhone 14 IOS 17.5 last charged battery in 94% and no use in night activity but battery drain around 9%…
Hi bro, overnight battery drain based on the graph looks totally normal. may be under 10% its reduced. if there is a problem you will see huge drop and more than 20% will reduce overnight when phone not in use.
In your case, the reduce could be due to apps notifications, network signal search and usage such reduce happened. dont worry. enjoy using it.