These kits represent the perfect balance of portability, affordability, and customisation, making them ideal for the everyday vaper. They consist of a compact, rechargeable battery unit and a small, disposable refillable pod cartridge.

The key defining feature is that the coil is either integrated into the pod (meaning you replace the whole 2ml pod when the coil burns out) or it uses separate, replaceable coils within the pod shell. This open system gives the customer complete freedom to refill the pod with their chosen 10ml nicotine salt or 50/50 e-liquid. They operate at low power, support the Mouth-to-Lung (MTL) draw, and offer lower running costs and far greater flavour variety compared to prefilled systems.

Prefilled systems, or Closed Pod Systems, are the simplest, most convenient option, designed to directly replace disposable vapes. They feature a rechargeable battery device (which is reused) and small pre-filled pods that snap into the device. The pods come sealed with the e-liquid and coil already inside—once the e-liquid is depleted, the entire pod is discarded.

While highly convenient with no refilling or coil changes required, the user is restricted to the specific flavours and nicotine strengths offered by the manufacturer's pre-filled pods. Newer innovations, like the Dojo Blast 10K and Lost Mary BM6000, may use a TPD-compliant 2ml pod paired with a separate, internal reservoir that automatically tops up the pod to provide a "big puff" count while still complying with UK regulations.

Sub-Ohm kits are the domain of experienced vapers, focusing on power, cloud production, and intense flavour delivery. These systems are typically known as Box Mods and feature a large battery (often using external, high-amperage 18650 or 21700 cells) and a complex chip that delivers high, adjustable wattage, usually 40{W up to 200W.

They require a specialised Sub-Ohm Tank which uses coils with a resistance below 1.0 ohm (e.g., 0.2 ohm or 0.4 ohm) and are designed for Direct-to-Lung (DTL) inhales. These kits are exclusively used with low-nicotine, High-VG e-liquids (shortfills) and demand a greater degree of technical knowledge regarding wattage settings and battery safety.