Lag in iPhone XR + heating issue

Hey aranyak273,

It appears that you're having a few problems with your iPhone XR. It's running slowly, it's getting warmer than expected, and the maximum capacity of the battery is showing 85%. We're glad to glad to provide assistance.

If your iPhone, iPad, or iPod touch gets too hot or too cold - Apple Support -- This article explains how to keep your device within acceptable operating temperatures. Have you seen the temperature warning screen? If not, your iPhone hasn't exceeded the threshold.

About iOS performance on your iPhone, iPad, or iPod touch - Apple Support -- Since your iPhone is running more slowly than expected, review the information and apply the steps provided in this article.

iPhone Battery and Performance - Apple Support -- This particular article includes a lot of links to help with the battery of your iPhone. Be sure to check each one.

We can understand your concern about the maximum capacity being at 85%, however, the battery is designed to retain up to 80% of its original capacity. Unless you receive an alert that the battery needs to be replaced, you should be fine for a bit longer.

About Optimized Battery Charging on your iPhone - Apple Support -- To help prolong the life of the battery, we recommend using Optimized Battery Charging if you aren't already.

Feel free to get back to us with any questions or problems you may have.

All the best.