Best time to use Low Power Mode and charge iPhone for battery health

NixenJ wrote:

Hello, I’m concerned about the health of my battery and have some questions about the low power mode. When is the ideal time to use it? What if I use it when my battery is below 20%? Also, I’m curious about the optimal battery percentage to charge my iPhone. For instance, if I reach 30%, should I immediately charge it to preserve battery health?

You are way overthinking this. Using the battery below 20% now and again won't make any significant difference. Don't let the battery drain to 0% if you can avoid it. Don't leave the battery places (like in a closed car in the summer) where it can get very hot. Other than that, it doesn't really matter that much.

Read this:

When to charge your iPhone or iPad - Apple Community

Charge Limit or Optimized Battery Chargin… - Apple Community

Use Low Power Mode whenever you want to save battery and don't need all of the performance. I use it a lot if I'm not going to be near a charger for a long time. Using it won't hurt your battery.

have you

read

About the battery and performance of

iPhone 11 and later - Apple Support

and maybe

iPhone Battery and Performance -

Apple Support

and Batteries -

Maximizing Performance - Apple