The Caliburn G2 and G3 are consecutive generations of Uwell's popular G line, where the G3 brought some big changes. The G3 upgrades the G2 with a larger 900mAh battery, an OLED screen, adjustable wattage up to 25W and better leak resistance, yet it swaps the G2's replaceable coils and full airflow dial for fixed coil pods and simpler airflow. This guide weighs up whether the newer model is the one to get.

For the wider range, our guide on the Caliburn range explained covers every model. Our comparison of the Caliburn A2 versus G2 looks at the simpler end.

The same line, evolved

Both devices belong to the Caliburn G line, the more capable side of the range, so they share a family resemblance and the same flavour focused goal. The G3 is the direct successor to the G2 and, importantly, launched at much the same price, which immediately makes it tempting. But Uwell did not simply add features, it also made a couple of trade offs in the pod design. So while the G3 is newer and more advanced in several ways, whether it is better for you depends on which features you value. This is a genuine upgrade in some areas and a sideways step in others.

Where the G3 improves

The G3 brings several clear upgrades over the G2. The battery grows from 750mAh to 900mAh, a useful twenty percent boost that means longer between charges, while USB-C fast charging tops it up quickly. Power rises from 18W to 25W for a warmer, fuller vape when you want it. The headline addition is an OLED screen showing battery, wattage and puff count, replacing the G2's simple light. Uwell also improved the leak resistance and bumped the pod capacity to 2.5ml. For battery life, power and information at a glance, the G3 is the stronger device.

Where the G2 holds its ground

The G3 is not a clean sweep, since the G2 retains a couple of genuine advantages. The biggest is coils: the G2 uses a pod with a separate replaceable coil, so you keep the pod and swap only the cheaper coil, whereas the G3 moved to fixed coil pods where you replace the whole pod each time. Some vapers prefer the G2's approach on cost and waste grounds. The G2 also has a fully adjustable airflow dial, while the G3 simplified this to two settings selected by rotating the pod. If you love fine airflow control or cheaper coil swaps, the older G2 still appeals.

To weigh them up, the Uwell Caliburn collection lists the G2, the G3 and their pods so you can compare specs and prices directly.

The coil question

The shift from replaceable coils to fixed coil pods is the most debated change, so it deserves a closer look. Uwell made the switch claiming the new sealed pods deliver better flavour and stronger leak resistance, with many reviewers agreeing the G3 pods do taste excellent. The downside is that replacing a whole pod costs a little more than swapping a bare coil, plus it produces marginally more waste. Whether this matters depends on your priorities. If you want the best flavour and fewest leaks, the G3 pods are a win, yet if running cost is your main concern, the G2's replaceable coils have the edge.

Which should you get?

For most people, the G3 is the one to get. The bigger battery, faster charging, higher power, OLED screen and improved leak resistance add up to a noticeably more modern device, so at a similar price the upgrades are hard to ignore. The main reasons to choose the G2 instead are if you specifically prefer replaceable coils for lower running costs or you want the fully adjustable airflow dial. If you are upgrading from a G2 you will likely find the G3 a clear step up, while a current G2 owner happy with their coils has no urgent need to switch.

How they fit the wider range

It helps to see where these two sit in the bigger picture, since the G line did not stop at the G3. Above the G3 sit the G3 Pro and the newer G4 and G5 models, which push power higher and add larger screens and bigger batteries, while the Caliburn X offers a feature rich alternative with full airflow control. Below the G line, the simpler A series and original focus purely on easy MTL vaping. So the G2 and G3 occupy the capable middle ground, balancing flavour, control and ease of use. If you are weighing them against simpler options, our comparison of the Caliburn A2 versus G2 is a useful companion read.

For anyone trying to decide across the whole lineup rather than just these two, it is worth stepping back to think about what you actually need from a device. Battery life, whether you want a screen, how much you care about coil cost and your preferred draw all point toward different models. Our buyer's guide on which Caliburn you should buy walks through those questions in order, while our guide on whether the Caliburn is still worth it in 2026 puts the range in current context against its rivals.

The bottom line

The Caliburn G3 is a worthwhile upgrade over the G2 for most vapers, adding a bigger 900mAh battery, 25W power, an OLED screen, faster charging and better leak resistance at a similar price. Its one trade off is the move from replaceable coils and a full airflow dial to fixed coil pods and simpler airflow. If you want the most modern, capable device the G3 wins, yet if cheap replaceable coils and fine airflow control matter most to you, the G2 still earns its place. Both deliver classic Caliburn flavour.

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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