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My launch day IP13 ProMax, it took 115 days to from Sept 24 to Jan 18 to finally drop to 99% (Or 141 days from the time it was built by Desay on Aug 30th). I expect that since I did have a whopping 103.9% health at launch day via Coconut. Just took much longer to drop below 100%

Then from 99% to 98% was 13 days. (Jan 31) ?
98% to 97%, 22 days...beats me (Feb 21)

I'm STILL sitting at 97% health as of March 21 though. I did strictly change charging habits, ONLY low watt charging on lighting port dock (no mag safe at all!)..Who knows, it may be helping or its some placibo effect??

In my mind, I STILL compare to the mess this exact time last year w/ 12 Pro Max. Battery dropped to 99% in less than 60 days from launch...4 week later it was already down to 95%. Plus using the phone for photos, especially video was a pain in the you know what. My batt level would drop to a dismal 70-80% in roughly 10-15 min. (Disgusted and already looking for battery power banks at that point). I used MagSafe 99% of the time.

Right now I am not having this drain issue whatsoever on this 13PM, not even close. Video taking on Sat night for about 30 min., I lost 3%.

Will the % drop more...yes, no question. But if it takes longer to decline..cool. I'm not going to stress about it, obsess like I did last year. If needed, I'll get a new battery. THIS phone I expect right now to keep until at least 2023. *I've mentioned before, my XS Max sat at 96% health after 2 years, 2 months....odd in comparison now.

I suspect Apple changed the way the health % shows since then. Personally I STILL think these batteries going back to the 12's are lower quality than before. AND I really do think MagSafe kills the health faster. Thats just my opinion.
 
My 12 Pro dropped to like around 90% iirc by June (bought in October I think) and I had Apple replace it. The new one was fine, was still at 100 when I traded it in for the 13 pro max in Oct. This 13 pro max is still at 100 for me.
 
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