SE battery drain since 15.5 update
Since updating iOS to 15.5, iPhone SE (2016 model) has been experiencing battery drain beyond belief. Have done all the usual stuff like reboot, soft reset etc, removed unnecessary apps. Battery health is at 90%, so very confused. This issue began within hours of performing the 15.5 update, and has been continuing ever since. A similar issue occurred with a previous update some years ago, which was resolved with the next update.
Any suggestions gratefully accepted.
iPhone SE