My iPhone 15 Pro battery health is dropping fast

Hello everyone,

I have an iPhone 15 Pro (Natural Titanium, 128GB) that I purchased in the US in 2024. I’ve been using the original 20W power adapter bought from the US too.

After about one year of usage in India, my battery health is at 90% with approximately 310 charge cycles.

I recently noticed that a friend in India, who owns the same iPhone 15 Pro model (purchased in December 2023), has a battery health of 88% but with over 730 charge cycles.

I’m puzzled by the difference in charge cycle counts and battery health between our devices, especially since my phone has fewer cycles but apparently worse charge cycle/battery health drop.

For context, I use the optimized battery charging feature, limit charging to 80%, and rarely let the battery drop below 30%.

Could this discrepancy be due to charger differences, usage habits or other factors, or is this normal and I shouldn't be worried?

I would greatly appreciate any insights or advice.

Thank you!

[Re-Titled by Moderator]

Original Title: iPhone 15 Pro - Battery Health