eblc1388 said:Even so, why a device with only 4 alkaline batteries can melt solder is hard to understand. I did used a similar device in work but that works on Ni-Cd batteries instead.
Alkaline batteries will 'self limit' the current, NiCd's will happily provide enough current to destroy themselves, as they have an extremely low internal resistance.
NiCd's would require some kind of external current limit (resistor of some kind), which is going to get HOT, rather spoiling the 'cool' feature of the device.
As a matter of interest, I just tried holding a piece of solder across a single AA Duracell, within a few seconds it was warm enough to make ne let go :lol: