Google cold heat. There is an article somewhere I read on it.

LenS wrote:

I've seen TV commercials for a portable, battery driven soldering tool
whose tip supposedly produces enough heat to solder small joints
almost instantly, and then, almost as quickly, cools enough to touch.

A tool like that would be very handy for me around the house if it
works as advertised. Has anyone actually seen or used one of these
tools?

Any comments will be gratefully received.

-Len