OK really quick….
Say you had a lab environment with 100% controlled heat/temperature/charging rates. Phones would still be different because batteries are different, come with different capacities, and wear differently.
Now, to the real world… User A charges their phone on a wireless pad in their car in the sun every day for hours - cooking their phone daily - using high energy applications charging several times a day. User B reads books, rarely uses their phone, charges via wire on a desk in a very cool office - lucky to use 25% battery a day.
Obviously in the above scenario, even if the batteries were PERFECTLY IDENTICAL - User A’s phone would deteriorate rapidly vs User B’s phone.
Now add in different battery capacities from factory, charge types, usage differences and it’s REALLY difficult to compare usage with other people.
My friend has a 13PM and I have a 13PM. My capacity is 101% and his is approaching 90%. His 13PM sits on a wireless charging pad overheating in the sun regularly and is used much more heavily than mine. His wife’s 13PM iPhone is used similarly but hers is still 99%.
Like another poster here said - their iPhone could sit at 90% for the next 2 years, etc. We just don’t know.
Battery health at glance is not as valuable as battery health over the LIFE of the phone. Highly recommend coconutBattery (Mac OS App) to watch the health of your phone over its life, not just one point in time. It’s possible the OP’s phone came under provisioned from the factory. Who knows.
