I bought my phone in last March. The iPhone 13 was 100% until October . After a while, it decreased until it reached 97% until March of this year. It was constant, and every two days it was draining 1%, and it became less and less, and now it is 89% if you use it. I don't use my phone much.I wish you would think about this issue, I have an obsession with the number, when it decreases, I get nervous for a long time... And that this problem can be solved in the next updates I remember that in the iPhone 11 series, the battery health bug increased after the update... I had all the phones from the iPhone 4 series and I was satisfied, but because of the fact that the battery is like this, I was discouraged to buy the rest of the new series products because it is definitely a major problem. It's true, we would like to buy a new product, but sometimes depending on the budget, sooner or later, at least you can fix this problem or even remove the battery health option. Instead of the 20% battery error that comes to finish charging, it is better to show a notification below 70% for the health of the battery.Right now, I really want my battery health to return to at least 96.97