iPhone 15 Pro Max Battery drain issue

Hi!
I have purchased iPhone 15 pro max on may as brand new. After 40 cycle counts battery health drops to 99% and at 81 cycles then it drops to 98% but the issue is now i have 97% battery health in just 86 cycle counts.
Is this normal ?

hi bro, as mentioned in our charging optimisation video, battery cycle count and battery health measurement wont be accurate or there is no guide how to measure it. continue following the charging practice suggested and that will maintain over period months usage.

yours is totally normal for 4 months and 2% reduce.

Okay bro. Already im following these 2 steps. Thank you bro.

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