Mods with internal batteries usually have slimmer designs than their removable battery counterparts. However, you usually can't vape and charge at the same time. Built-in batteries also usually have a lower short-term cost, and if you're not buying a single-battery device, you might have to pay for two or three removable batteries and a charger in addition to the mod (vaping at over 100 watts requires two batteries).

On the other hand, the cost of replacing a mod with a worn-out internal battery can hurt in the long term - no battery lasts forever. The other benefit of choosing a mod with external batteries is that with multiple batteries you can charge and vape simultaneously, eliminating your vape's downtime.

Any mod that contains a chipset is regarded as a regulated mod, and any mod that doesn't is considered a mechanical mod. When vaping first became popular, mechanical mods were the norm, and the lack of safety features from a chipset had the potential to lead to batteries overheating and causing damage. Regulated mods are now the norm and recommended for any vaper who isn't highly familiar with Ohm's Law. With the inclusion of chipsets, regulated battery mods are no more likely to explode than your phone or laptop battery. If you want to consider using a mechanical mod, make sure you know exactly how to use Ohm's Law with your vape kit.

Standard e-cigarettes use a 18650 lithium-ion battery. This can vary between battery mods, so double-check with your instructions.

Most vape devices charge through USB-C charging cables. Check you have the right cable and it's attached to the device correctly. If it is, check if your charger works with a different battery, or if the plug socket is getting power. Batteries don't last forever, so if the charger is working and your e-cig is refusing to charge, it might be time to replace the battery or vape. It can also take several hours to fully charge an e-cig mod, especially if the mod is new.

Regulated mods come with a chipset. Mechanical mods don't. Chipsets include the safety features of a vape, like a ten-second cut off to stop your wick from burning. In addition to this, mechanical mods require knowledge of Ohm's Law, an equation used to work out the number of amps needed from your vape battery. This might seem like a lot of work, but using a mod with no chipset means there's no circuitry to go wrong when vaping. It's also the way that many viral vape tricks are done. Mechanical mods are legal, but there are a lot of ways they can go wrong, and unlike when vapes first began, 350-watt regulated vapes exist to satisfy the needs of big cloud-chasers.