How to maintain 100 percent battery health
how to maintain 100 percent battery health
iPhone 13
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You cannot. Your iPhone's battery will deteriorate with time no matter what you do. The battery is a consumable product. 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.