Pod kits initially came to the market as ultra slim devices, which were and still are great for most vape users. The limitation of smaller kits can ultimately be battery life and muted performance. These pod kits have now evolved into what are known as pod mod kits, or 'pod mods'. Pod mods come with better battery life, detachable and refillable pods along with adjustable power as you would find on any box mod device. Some will allow you to use a replaceable battery and even fit your own tank on (with a suitable connector), instead of the pod supplied with the device.