A soldering iron is a hand tool used in soldering. It supplies heat to melt solder so that it can flow into the joint between two workpieces.
A soldering iron is composed of a heated metal tip and an insulated handle. Heating is often achieved electrically, by passing an electric current (supplied through an electrical cord or battery cables) through a resistive heating element.
In this video you gonna learn how to make a Portable BATTERY SOLDERING IRON in just 5mins.This mini electric appliance is not designed to be used for a long time, rather just to eliminate some small problems.
Cordless irons can be heated by combustion of gas stored in a small tank, often using a catalytic heater rather than a flame.
Soldering irons can be dangerous if not used properly, do not let the hot tip touch yourself anything flammable. You can easily burn yourself or start a fire if used improperly.