Or I guess it doesn't matter?? Desay, Sunwoda or Huapa.
All are near 90% or below it. I still go back to my XS Max having a 96% health after 2 years, 2 months (i miss that) before trading it in for the 12PM.
I don't even know what to say or think anymore. Batteries are extremely cheap, the actual phone AND/OR iOS is deeply flawed, or all of the above.
You could be absolutely right.
My only thoughts on this are, I've asked a few people I know who use really old iPhones as their daily drivers - hooked them up to coconutBattery and yeah, some of their capacities were down to 50-60% with thousands of cycles and they were charging all the time. My guess is that as the battery wears, you could hit a time period where it doesn't drop at all, or may drop more slowly at some points and not others.
For example: Dropping the initial first 20% of capacity really fast, then the next 10-20% takes years.
In my work Dell Laptops - seems to me that the first 15-20% drops rapidly, within the first 6 months, then it mellows out and will spend years around the 20-30% of capacity stage. <shrug> just an observation, no idea if that's what is happening here.
Battery technology today is so much better than it was in the past - the voltage requirements, the demand we place on them, the heavy non-stop usage (screen on time), and the temperature extremes (wireless charging, using in the summer, etc). I remember my Note 3. It lost 50% of it's capacity in 6 months. Yeah, I could buy an Anker replacement for like $15 or something, but those batteries didn't last at all (same for my Droid 1 batteries). My personal Dell Latitude D820 (back in the day) went from 100% capacity to 0% capacity in less than a year.
I think that's why Tesla provides that initial over capacity - so if there's an initial drop or heavy usage, the user still sees 100% even after a few years? I'm assuming.
I think showing the battery % is causing a lot of undue stress and suffering for people (I know it would me, so I'm including myself in this - despite lucking out on my battery capacity). Doesn't help these devices are getting so dang expensive either.
Kind of further cements my idea of just leasing these phones and getting a new one every few years.