Battery Health iPhone 12 Mini

Excessive use, overheating and irregular charging can lead to affects on you're iPhones battery. I can recommend you take a read of this article (iPhone Battery and Performance - Apple Support) by Apple. If you are experiencing an issue and you got your iPhone in October 2021 then it should still be under warranty, its worth a shot talking to Apple about this matter if you believe that you haven't caused this issue.

1% in two months is not abnormal. It is normal ageing.

Have the battery replaced at 79%.

No point in talking to Apple about it as it is not an issue.

The worst think Apple ever did for iPhones is to put in the battery health algorithm, it just worries people unnecessarily.

Apple will not replace a battery under warranty unless it gets to 79% inside 12 months, or it has severe problems delivering power.