First of all, let's clarify what Ohms are. An ohm is the measure of electrical resistance of the coil inside a pod or tank. It is normally shown using this symbol - Ω. The more wraps a coil has and the thinner said wire is, the higher the resistance and fewer, thicker wraps of wire tend to be a lower resistance. Any atomizer coil with a resistance below 1.00 ohms such as (0.50, 0.15, etc.) is a sub-ohm coil.

DTL (Direct To Lung or most commonly known as Sub-Ohm) devices are better used with VG-based E-Liquids, as they are much thicker than PG based liquids, and more intense than MTL. They are also best used with a lower nicotine strength, increasing the flavour production. Direct-To-Lung tanks use thicker e-liquids, like those composed of 60% VG or higher percentages. This delivers a lower throat hit, as well as an enhanced flavour.

Ideally you want to use the compatible charger provided with the purchase kit, at all times. The reason for this is if a charger that is not compatible with the device is used, too much current goes into the batteries, meaning they can overheat and eventually stop functioning. Battery capacities vary from each device; they will indicate an mAh, which essentially is the battery capacity. Usually after a 6 months use, the capacity within the battery starts to decrease, making the battery life last less.

Most coils can last up to  5-10 days, although that approximation depends on how often you vape, and your vaping habits. An important aspect is knowing the signs of needing to refill your tank, in order to avoid firing the device while there's no liquid, and consecutively burning the cotton of the coil. Two warning signs that you need to change your coil is a reduction in flavor production, and a lower amount of vapor emitted from your tank.

Voltage is the direct current given out by the battery and the wattage is the measure of power distributed to the coil from the battery. Wattage can be changed easily using a variable wattage device. More importantly, Voltage will take all the set power the user has defined in the menu and send all of it through the coil. Variable Wattage on the other hand uses the coil's resistance as a guideline and takes the Ohms into consideration, ensuring too much power is not sent to the coil causing it to fail. VW is used in every single regulated device today as it is the most popular form of adjustment.

Some mods have temperature control modes - the range shows the temperature that the coils will heat up to when the product is in use. This is normally between 200°C- 250°C / 392°F – 480°F although it tends to vary from manufacturer to manufacturer. The great thing about a temperature control mod, is the ability to fine tune the best temperature for a coil. For instance, a temperature can be set for a particular coil and the device will do it's best to stay within that set temperature range. Some vapers enjoy a cooler or warmer vape and the TC mode allows them to fine tune their vape.