I make wires and interconnects regularly at my job using various connectorization techniques. Soldering is a fairly regular technique utilized. One day at Home Depot I saw these "As Seen On TV" cold heat soldering irons. I admit, they look pretty cool!
Well guess what. . . They Suck!
At least, ther're pretty useless in soldering wire. They may have some useful application, but certainly not for making interconnects.
They have split tips that must contact the same metal to close the circuit and create continuity fo rthe iron to get hot. It makes getting both wires or metal surfaces hot (to create a good solder joint) next to impossible. This is particularly true with soldering connectors on the end of a wire. It may work fine for soldering two wires together but sometimes. . .
if it looks too good to be true. . .
I think we initially bought three, one tip broke the first time trying, they take too many batteries, and they're just not that practical.
IMHO