+1. If you can't take the pack out of your bird and comfortable hold it in your hand, something is wrong.frying pan hot? Yes that's an issue if you aren't being hyperbolic. However, the Phantom 3 batteries do become very hot (not so hot you can't touch them - but hot enough to be considered more than mildly warm).
If you bring them inside and they return to normal temp and can charge within about 15-20 mins than you are probably fine.
If you can cook an egg on your battery... that's bad
Yes, I agree. I just returned from flying for 13 minutes, and I also DO NOT put the pedal to the medal. Outside temp was 87 degrees and the battery temp was recorded at 120.1 degrees. That is not bad. Upon landing, I turn the P4 off and remove the battery and place it where a breeze can help cool the cells.I've flown a number of times in 80-85f temps and the batteries have only ever been hot, but never too hot to hold it. Having said that, I don't go hammering the AC.