A mechanical mod is the power supply for your vaporizer, and unlike regulated vaporizer pens and box mods, they have no internal circuitry. The internal circuitry is what would keep a regulated mod’s battery from firing if the circuit is unsafe. Mechanical mods complete the circuit if the button is pressed, and if you aren’t careful with your build – it could blow up in your face… literally.


Many users of these mechanical mods will use a rebuildable atomizer (RDA) with custom build coils andvaporizer wicking material to vaporize their juice. The wire most often used is A1 Kanthal, though G-plat (a metal mix), Titanium, Kanthal A, Nichrome, Ribbon Kanthal, Bakero wire, and even (surgical grade) Stainless Steel can be used. It does come down to preference and cost, for most vapers. With the A1 Kanthal, the wire guage typically ranged from 20-32, the higher the gauge, the smaller the wire diameter. Though organic cotton is typically used as the wicking material, you can also use Silika, Ekowool, Stainless steel mesh, or Stainless steel cable (NON GALVANIZED! Do not use galvanized stainless steel in vaping.).


Most mechanical mods utilize an 18650 battery. An authentic 18650-sized battery should be 18mm wide and 65mm long, with a weight no less than 45 grams. The most important things you need to know about your battery (apart from authenticity – third party knockoffs are dangerous!) are the battery life and the amperage limit. Both of these will be published either on the battery listing when you purchase it, and more than likely also printed right onto your battery casing. Battery life is measured in milliamp-hours (mAh). This number is the amount of charge that the battery can store at once. The amperage limit (amp limit), measured in amps (A), refers to how much current the battery is able to safely discharge at once.

With these batteries, you may see the term “Continuous discharge.” Continuous discharge means that the battery is able to discharge that number of amps for a longer period of time without becoming damaged. Pulse discharge on the other hand means that the battery can only reach that discharge level for roughly 6-7 seconds without damaging itself.


Ohm’s Law is the fundamental relationship in electricity which can help us find the output of a circuit, due to the relationship between voltage (V) – measured in volts, resistance (R) – measured in ohms, and current (I) – measured in amps. Of course, with vaping we can include Power (P), which is the product of current and voltage.

The amperage (amps) is the amount of current that passes through a point on the completed circuit every second. In order to vape safely – you need to check the resistance and solve for the amperage, making sure that it does not exceed the pulse discharge limit for your battery.

This is crucial and we cannot state it enough: you MUST check the resistance of your coils before firing on a device. Know the limitations of your device and you will have a good time. Think you have some magical innate ability to just guess your way through this? Good luck with half a face.

For the calculations, almost all batteries used for this purpose will discharge 4.2 volts at their peak (fresh after charging), dropping off quickly to 3.7 volts, remaining there until they are nearly dead. For safety’s sake, solve using the full 4.2 volts when checking the safety of your coils – this will add an extra safety margin allowing for deviations. It is all too easy to short an atomizer, or your battery, and damage your device (or your body). Resistance testers are specifically designed for vaping, and can be found in some online stores for less than eight dollars and can save you a lot of grief.