I have never seen one... and hot melts tend to be high wattage units that
might suck a battery dry in a matter of a couple of minutes and that would
lead to premature battery failure IMHO.


I have an old Craftsman glue gun that you plug in for a while until nice & hot
then the cord unplugs from the gun and works for quite a while before needing
plugged back in for reheating. Not really cordless, but it gets the cord out of
the way while using. No idea if this meets the OP's needs or if they are still
sold or even if all glue guns are this way. I seldom use the thing.

Dave Hall