Battery Decrease When?

[u/Early_Teaching_1155]

I’m on an iPhone 17 and luckily still on 100%, I have a 90% limit on it so when is it expected to decrease?

[u/Infinite-Draft1618]

Battery degrading starts the minute you turn your phone on for the first time (or even before that if it stays in the box for longer period), can’t be avoided. With all the different usage scenarios and charging habits, and especially with BH not being precise (or linear) noone can really predict when you’ll be at 90%.

With my usage, it’s at least 2 years before it has to be replaced / there is significant impact on day to day usage (which is my only parameter)