Uwell Caliburn G4 Pro Pod Vape Kit

Uwell's Caliburn range is, for a huge number of vapers, the name that turned them into pod-kit converts, and the Caliburn G4 Pro is the latest expression of everything that made the series so beloved. Uwell has always chased one thing above all others with Caliburn: flavour. The G4 Pro carries that obsession forward with the brand's Pro-FOCS taste technology, wrapped in a body that feels premium and a pod system that is a pleasure to live with day to day. If you have ever heard someone rave about how much taste they get from a little pocket device, there is a fair chance they were holding a Caliburn. Before we go further, a necessary reminder: nicotine is addictive, and this kit is for adults aged 18 and over only.

What you are getting

The Caliburn G4 Pro is a refillable pod kit, meaning you fill the pods yourself and reuse the device rather than throwing it away. It sits at the more refined end of the pod-kit spectrum, blending the effortless ease that made the original Caliburn famous with extra tuning for people who like to shape their vape. You provide the e-liquid, top the pod up when it runs low, and swap in a fresh pod every so often to keep the flavour singing. It is reusable, low-waste and built to be a companion rather than a throwaway.

Flavour first, thanks to Pro-FOCS

Uwell's Pro-FOCS technology is the reason the Caliburn name means so much to flavour chasers. It is the brand's approach to coil and pod design aimed squarely at extracting the cleanest, truest taste from your e-liquid, and in practice the G4 Pro delivers exactly that: crisp, well-defined flavour where cheaper devices can taste muddy or flat. If taste is your priority above all else, this is a device that takes it seriously.

Design and build quality

The G4 Pro has the reassuringly solid, grown-up feel that Caliburn devices are known for. It is compact and pocket-friendly without feeling flimsy, with clean lines and a durable finish that shrugs off everyday knocks. The pod locks in securely, the whole thing sits comfortably in the palm, and there is a clear readout to keep you informed about battery and settings at a glance. It looks understated and classy rather than flashy, which is exactly why it appeals to such a broad audience, from first-time switchers to seasoned enthusiasts.

The pods and coils

Filling is handled through a straightforward, well-sealed port on the pod, and the pods magnetically seat into the device with a satisfying hold. Uwell's G-series coils are the beating heart of the experience, engineered around that Pro-FOCS philosophy for maximum flavour and a respectable working life before taste begins to tail off. Different coil resistances across the range let you steer the device towards a tight mouth-to-lung draw or a slightly more open, warmer pull, so you can set it up to match your liquid and your preferred style rather than accept a one-size-fits-all vape.

Setting it up and filling

Getting going is genuinely easy. Remove the pod, open the fill port, and add your e-liquid slowly until the pod is nearly full without overfilling. Close the port, click the pod back into the body, and then let it sit for a few minutes so the coil can properly soak up the liquid. This priming step is the single most important habit to protect your coil from burning and to unlock the full flavour the G4 Pro is capable of. With every fresh coil, patience for those few minutes pays off handsomely.

Airflow and the draw

Adjustable airflow puts the character of the vape in your hands. Close it down and the Caliburn delivers the tight, controlled mouth-to-lung draw that made it a favourite among ex-smokers, closely echoing the sensation of a cigarette. Open it up and the draw loosens into something warmer and airier, better suited to lower strengths. The device fires on the draw, so there is no button to fuss with; you simply inhale and it responds. That combination of adjustable airflow and standout flavour is what keeps Caliburn owners so fiercely loyal.

Battery and charging

The integrated battery is sized to see most vapers comfortably through a day of typical use, and recharging is quick and universal via USB-C. That means the same cable that charges your phone will very likely do the job, so there is nothing proprietary to keep track of. Sensible battery care applies: charge on a hard surface, avoid leaving it plugged in and unattended for long periods, and keep it away from extreme heat or cold to protect both the cell and its longevity.

Best e-liquids to pair

• Nic salt e-liquids are the classic Caliburn match, giving a smooth yet strong hit on the tighter airflow setting that suits smokers and disposable-switchers perfectly.
• 50/50 freebase liquids shine here too, opening up an enormous choice of flavours and working across the airflow range.
• Higher-VG liquids can be enjoyed with the airflow opened for a little more vapour, though the G4 Pro is fundamentally a flavour and satisfaction device.

Whatever you enjoy, the PinkVape e-liquid range has a strength and flavour to suit, letting the Caliburn's flavour talents really shine.

Value and running cost

Reusable always wins on cost, and the Caliburn G4 Pro is a fine example. Set against a continual disposable habit, refilling with bottled e-liquid and occasionally replacing a low-cost pod or coil is dramatically cheaper over the course of a month, let alone a year. You also cut your waste to a tiny fraction. For a device that punches so far above its size on flavour, the long-term economics make it an easy recommendation.

Who it is for

The G4 Pro is tailor-made for the vaper who treats flavour as the whole point. It suits the ex-smoker wanting a satisfying, tight draw, the disposable user ready to graduate to something reusable, and the experienced hobbyist after a classy pocket device for everyday carry. If your goal is enormous sub-ohm clouds, a dedicated mod will serve you better, but for pure, refined, portable flavour the Caliburn remains a benchmark.

Care and maintenance

• Prime and soak every new coil or pod for a few minutes before the first vape.
• Top up before the pod runs dry to avoid burning the coil early.
• If the flavour turns muted or harsh, fit a fresh pod or coil.
• Wipe the pod and device contacts with a dry tissue to keep the connection clean.
• Store the kit upright and away from heat and direct sunlight to protect the liquid and battery.

Frequently asked questions

What makes the Caliburn known for flavour?

Uwell's Pro-FOCS technology, built into the pods and coils, is designed to extract the cleanest possible taste from your e-liquid. It is the main reason the Caliburn range has such a strong reputation among flavour-focused vapers.

How long does a pod or coil last?

As a general guide, most people get somewhere around one to two weeks of regular use before the flavour begins to fade and a fresh pod or coil is worthwhile. Priming properly and never running it dry helps it last towards the longer end.

Can I adjust how tight the draw feels?

Yes. The adjustable airflow lets you close things down for a tight, cigarette-style mouth-to-lung draw or open them up for a warmer, airier pull, so you can match the device to your preference and liquid.

Is it beginner-friendly?

Very much so. The draw-activated firing, simple fill port and USB-C charging make it easy for a first-time refillable user, while the flavour quality and airflow control keep it satisfying for experienced vapers. It is available only to adults aged 18 and over, and nicotine is addictive.