To see any differences between the software versions, I did this battery discharge test with 3 phones of the same kind, which have different versions of IOS.
Accurate and relevant battery test comparison between IOS 17.4.1, 17.7.1 and 18.1

Also, if you want to find out if it is worth changing the iPhone battery with an aftermarket one, here is the video link :
[ Ссылка ]

свернуть