Battery Replacement

Hi. My phone battery is now at 93% after almost a year after purchase. My limited warranty will expire on 15th December 2021 for the 12 Pro Max.

I am thinking of replacing my battery but i’m not sure if it will be covered under the warranty or i’ll need to pay £69.

Ever since updating to the iOS 15, battery seemed to be draining fast.

I tried all the battery saving tips that I found online but still no changes.

Should have remained with iOS 14.8 if I could.

Thanks in advance.