Hey Nekan91,
Thanks for the reply, and additional info. We appreciate it!
I can understand your question, as battery health is important. However, as long as the battery health is not below 80%, your battery is good. Below 80%, and it's time to get the battery replaced. Here's more information about battery health:
iPhone Battery and Performance
Here's some good information About Optimized Battery Charging on your iPhone.
if you want to see how apps are using the battery on your iPhone, this is a great article: About the battery usage on your iPhone, iPad, and iPod touch
I hope this information helps out!
Enjoy your day!