You had to go through 4 replacements and they all same behavior?
Get another replacement until they give you good one.No two for different issues and two for the same issue
I will do that thanks for the advise
Are you getting these replacements from an Apple Store or are they mailing them to you? If it were me I’d go into an Apple Store, ask for a replacement, and not leave the store until you’ve inspected and tested out the replacement.
I use the Apple smart battery case and always restoring as brand new maybe it's bad luck on me or the store has horrible replacements
My 6s plus been though 7 replacment the iPhone 7 been replaced 4 times now going into replacment 5
That possible but apple will replace again maybe my smart battery case is the problem who know ? I only use my iPhone for social media and musicWhat you are experiencing is far from normal, and I would highly doubt that you are getting bad replacements. Something in your usage is causing issue.
We had a problem with my wife's 6S (known battery issue). Had it replaced about 6 months ago, and all is well. I don't see any difference in quality in the replacement vs the original.