Battery health draining fast

That value is approximate and, most of all, is related to when the battery (not the iPhone) was new.

That said, read this support article very carefully:--> iPhone Battery and Performance

and/or this one:--> Batteries - Maximizing Performance - Apple

and/or these suggestions:--> When to charge your iPhone or iPad - Apple Community

Thanks and regards

Giulio

iPhone 14 Pro battery health draining fast, been only 7 months and it’s at 96%

I have updated to ios17