You have to use it PJB. If you don’t use it, of course it won’t get hot.
My phone gets pretty damn warm…but that’s because I’m ALWAYS texting or browsing on it. Not to mention I have my entire work calendar, help tickets, etc. synced to my phone so it’s always being used for one thing or another.
To the OP…
My phone utilizes Palms “Touchstone” charging device. I can use my phone while it’s on the dock. And my battery is Lithium Ion…so I’m pretty sure this only applies to older phones as stated many times in this thread.