So, I bought the phone in early Feb this year. With a ordinary charging habbit - that means, leaving the optimised charghing on and very rarely going below 20%, and unplug in the worst case at 90% - the battery health dropped at 98%. I am an android user and this is my first iPhone in like 5 years. For the record, i'm coming from an S10 with an amazing battery that i was charging once in a day and a half (sometimes 2 and a half ) that's with a medium to high power use. Hope ypu guys might know something about the whole situation. Peace!