Why my battery is not lasting?
Why my battery health is down and not lasting
iPhone 7 Plus, iOS 14
Question marked as
Best reply
You should change out the battery once your Battery Health reaches below 80% which will take over 2 years to reach under normal usage. Until then enjoy your iPhone.
Here is some more reading on an iPhone battery and its performance ➔ iPhone Battery and Performance - Apple Support
Axel F.