These kits are a step up from the pen style starter kits. They will usually have a larger and more powerful battery, allowing you to vape a wider range of liquids for longer. They tend to provide better flavour notes and thicker vape clouds than a traditional starter kit, so if you are looking for something just a bit more powerful than a starter kit, then this may be the option for you. These kits will also usually have a built-in battery, however some options may not.