The Caliburn name covers a whole family of pod kits, which can make choosing one confusing. The Caliburn range runs from the simple original and A series, through the airflow adjustable G, G2 and G3, to feature rich models like the G3 Pro and Caliburn X, with each adding battery, wattage or control upgrades over its predecessor. This guide explains every main model and how they compare.

Once you know the models, our guide on which Caliburn you should buy helps you choose. Our guide on the best Caliburn for beginners is ideal if you are new.

The two main families

It helps to know that the Caliburn lineup splits broadly into two families plus a few standalones. The A series, including the original Caliburn, focuses on simplicity, with tight MTL vaping and minimal or no settings. The G series, from the Caliburn G onwards, adds adjustable airflow, replaceable coils on some models and more power, suiting people who want a little more control or a looser draw. Alongside these sit the boxy KOKO models and the premium Caliburn X. Knowing which family a model belongs to tells you most of what you need at a glance.

The original Caliburn and A series

The original 2019 Caliburn is the device that started it all, a tiny draw activated pod with a 520mAh battery, around 11W of power and no adjustable settings, tuned purely for a tight MTL draw. The A series that followed, including the A2, A3 and their variants, refined this simple formula with mesh coils, USB-C charging on newer models and small battery bumps to around 520 to 690mAh. The A series remains the most beginner friendly part of the range, prizing fuss free reliability over features. If you want a vape that just works with nothing to fiddle, this is the family to look at.

The G series

The G series is where the Caliburn grew up. The original Caliburn G introduced adjustable airflow, done by reversing the pod, plus replaceable coils and a bigger battery than the original. The G2 followed with a dual firing system, an airflow dial and replaceable 0.8 and 1.0 ohm coils. The G3 then brought the biggest leap, adding an OLED screen, adjustable wattage up to 25W, a larger 900mAh battery, USB-C fast charging and improved leak resistance, though it switched to fixed coil pods. For most vapers wanting flavour with a touch of control, the G series hits the sweet spot.

To see the whole lineup side by side, the Uwell Caliburn collection brings every current model and its pods together in one place.

The Pro models and the KOKO shape

Above the standard G3 sit the Pro models and the boxy KOKO variants. The Caliburn G3 Pro pushes power up to 35W, adds a larger screen and swaps pod rotation for a smooth side slider airflow, with a bigger battery for longer life. The KOKO models, such as the GK2, GK3 and G3 Pro KOKO, take the same internals and wrap them in a square, pocket friendly shape, often with a lanyard loop and decorative panels. Choosing between a standard pen shape and a KOKO square is largely about how the device feels in your hand and pocket rather than performance.

The Caliburn X

The Caliburn X sits as a feature rich flagship for people who like to tinker. It pairs an OLED screen showing wattage, battery and coil resistance with fully adjustable power and airflow, a generous 850mAh battery and a roomy 3ml pod. It is aimed squarely at vapers who prefer adjusting settings rather than leaving everything automatic, while staying compact enough for daily carry. If the simpler models feel too basic and you enjoy fine tuning your vape, the X gives you the most control in the range without straying from the Caliburn's flavour focused roots.

A note on pod compatibility

One important practical point is that pods are not interchangeable across the families. Caliburn G pods fit only Caliburn G devices, G2 pods fit the G2, while the G3 uses its own pod platform shared with the newer G3 Pro and later models. The simpler A series and original each have their own pods too. This means when you buy replacement pods you must match them to your exact model, so it is always worth checking the model name on your device first. Buying the wrong pods is a common and easily avoided mistake.

How the range has evolved

Looking at the lineup as a whole, a clear pattern emerges in how Uwell has developed it. Rather than reinventing the device with each release, the brand has steadily refined the same winning formula, addressing real user complaints one at a time. Early models were criticised for small batteries, so later ones grew from 520mAh toward 900mAh and beyond. Charging moved from slow Micro USB to fast USB-C. Leak resistance, screens, adjustable power and airflow all arrived gradually. This measured evolution is a big reason the range has stayed relevant for years, since each generation fixes genuine shortcomings rather than chasing gimmicks.

That history also explains why older models remain perfectly usable. An original Caliburn or an A2 still does the core job well, so you are not forced onto the newest release to get a good vape. The newer models simply add convenience and control on top of an already solid foundation. If you want to weigh specific generations against each other, our comparison of the Caliburn G2 versus G3 and our guide on whether the Caliburn is still worth it in 2026 both dig into how the range stacks up today.

The bottom line

The Caliburn range spans from the dead simple original and A series, through the adjustable G, G2 and G3, up to the powerful G3 Pro and the feature rich Caliburn X, with KOKO variants offering a boxier shape throughout. Each step generally adds battery, power or control. Simpler models suit beginners wanting reliability, while the G series and X reward those who like options. Whichever you pick, you get the flavour and quality the Caliburn name is built on, so it comes down to how much control you want.

For more guides across the range, visit the Brand Insights: Uwell Caliburn hub. When you are ready, head to the Uwell Caliburn collection.

Vaping products are intended for use by existing adult smokers and vapers aged 18 or over. Always follow the manufacturer instructions supplied with your Uwell Caliburn device. Sold in line with UK regulations.

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