Trying to figure out how vape pens or mods work can be a confusing and frustrating task if you don't know where to start. These devices, however, aren't that complicated, so don't worry too much. We try our best to take the guesswork out in trying to get you started at minimal cost. We have found that the Crown 3 coils are the fastest and easiest coil to use and swap over, so you aren't deterred in using your new mod. Depending on the vaping liquid you are using a single coil can last up to 2000 to 3000 vapes, once you start losing flavour or taste or encounter a burnt taste you should change your coil right away.