With the heat we have been having over the past few weeks I have noticed that my KX3 tends to get a bit warm at times, and of course the radio has no internal fan to aid in cooling...so I needed a solution.
I went looking for 4" or 2" computer cooling fans that I could rig up to help keep things cool, but nobody around my location stocks them.
Just by chance I was in a Dollar Store two days ago and came across what was listed as a "personal fan", and it had possibilities. So, ever the big spender, I coughed up the $3 and bought one. It's turned out to be absolutely perfect for the job, keeps the radio cool and I'm no longer worried about over-heating the KX3.
This item runs on two AA batteries: