A mechanical MOD is an advanced power source device. It’s most simple form is a tube that holds a replaceable, rechargeable battery. The tube has a button, that when engaged completes a circuit that delivers unregulated current to the atomizer. A mechanical mod contains no wiring,soldering, or electronics. Because of this, Mechanical MODS tend to have a very long life, requiring only simple battery changes/charges. Vaping can be customized by changing the resistance of the atomizer, as opposed to changing the voltage of the power source.