Phone gets warm and will not charge

Greetings leefrombillings,

It looks like you joined the Apple Support Communities from an excellent starting point; iPhone Battery and Performance - Apple Support.

However, since this issue is related to the iPhone not taking a charge, the information on this page may be better suited to help with resolving your issue: If your iPhone or iPod touch won't charge - Apple Support.

Please make note that it may be expected behavior for your iPhone to stop charging at 80% depending on your settings:

If your device stopped charging at 80 percent

Your iPhone might get slightly warmer while it charges. To extend the lifespan of your battery, if the battery gets too warm, software might limit charging above 80 percent. Your iPhone will charge again when the temperature drops. Try moving your iPhone and charger to a cooler location.

iOS 13 and later use Optimized Battery Charging to slow the rate of battery aging by reducing the time that your iPhone spends fully charged. Your iPhone uses on-device machine learning to understand your daily charging routine so that it can wait until you need to use your iPhone to finish charging past 80 percent.* Optimized Battery Charging is active only when your iPhone predicts that it will be connected to a charger for a long period of time.

We hope this information helps you out.

Cheers!