iPhone overheating/charging issues since iOS 26.5.1

I found my iPhone 16 was overheating while charging when I had on a surface that holds the heat (like a table or lounge chair arm). Now I sit the phone on an empty box (maybe an empty box of pain killers), something fairly small where your phone has plenty on air around it to allow it to stay cooler.

jj_mack wrote:

Since posting, I have heard this issue is happening on iPhone 17 Pro’s, 17 Pro Max’s, 17’s and 16’s. Same issue of quick battery drainage, no charging whilst using the phone and phone getting really hot, more so than what it usually does whilst charging.

We have iPhone 17 Pro and 17 Pro Max. Neither phone is having any unusual battery drain or heating issues. I've been up since about 7:00 AM this morning and my phone came off its charger and now it's after 10 PM and while I haven't used my phone heavily today, my phone is at 91% remaining charge, with no heat whatsoever. You can hear anything anywhere, but if this was a significant issue, this forum would be flooded with people complaining, but it's not. The tech press would be all over this, but they're not.

There are at least 1.5 Billion people using more than 2.5 Billion devices. You can read some people are having issues, but the percentage of users with issues would be tiny compared to the number of people using their phones without any issues. Keep in mind that people who are out there, happily using their phones without issues aren't generally on a forum saying "hey my phone is operating perfectly." But people who may have an issue often do post. It's like walking into a hospital and seeing sick people and coming to the conclusion everyone out there must be sick.

You need to determine what is causing issues for you. And the link Lawrence Finch provided, would be a good first place to check.

Start here: Why is my iPhone overheating? - Apple Community