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If you've spent more than five minutes browsing pod systems, you've seen the Uwell Caliburn name pop up. It's one of the most trusted pod lines in the world, and for good reason — reliable flavour, leak-resistant builds, and a form factor that fits comfortably in any pocket. But with three active generations on the market (G2, G3, and G4), knowing which one to actually buy has become its own challenge.

This guide breaks down each device side by side — specs, pods, who it suits, and whether it's worth your hard-earned rand.

A Quick Word on the Caliburn G Family

The Caliburn G line (the "G" stands for Grand) is Uwell's advanced pod series — devices that use replaceable coils rather than replacing the entire pod every time. This makes them significantly more cost-effective in the long run and gives you more control over your vaping style. Each generation has built on the last, and the G4 in particular is a meaningful leap forward from where the series started.

Uwell Caliburn G2 — The Reliable Workhorse

Specs at a Glance

What Makes the G2 Stand Out

The G2 is where most vapers who moved on from disposables found their footing. It's slim (110mm x 22.5mm x 13mm), lightweight at just 36g, and genuinely simple to use. The fixed 18W output means there's no fiddling with wattage settings — you plug in a coil, fill the pod, and vape.

One of the G2's most underrated features is its adjustable airflow wheel, which gives you surprisingly precise control over your draw tightness. Pair the 1.2Ω coil for a tighter, more cigarette-like MTL draw, or drop to the 0.8Ω for a slightly airier, cooler vape. Both are available as separate purchases, meaning you can customise your setup without buying a new device.

The USB-C charging and haptic feedback (a vibration when you attach a pod) were small upgrades that made everyday use noticeably smoother.

Who Should Buy the G2

The G2 is the right choice if you want a no-nonsense pod device at a budget-friendly price, you prefer replaceable coils over integrated pod coils, or you're new to pod vaping and don't need a colour screen or variable wattage.

Limitations to Know

There's no screen — just an LED that indicates battery level. Output is fixed, so you can't fine-tune wattage. Compared to newer generations, the 2ml pod capacity feels a little small for a full day of vaping.

Uwell Caliburn G3 — The Step-Up That Changed the Game

Specs at a Glance

What Makes the G3 Stand Out

When the G3 launched, it immediately made the G2 look dated. The jump in battery from 750mAh to 900mAh gave it noticeably better all-day longevity, and the addition of an OLED display with adjustable wattage (up to 25W) opened up a level of control the G2 couldn't offer.

The G3 also introduced a new closed pod system — rather than replaceable coils inside an open pod, the coil is built into the pod itself. Uwell's argument was that this design produces better flavour and is more leak-resistant, and in practice, they were right. The FeCrAl alloy mesh coils inside the G3's 0.6Ω and 0.9Ω pods deliver clean, consistent flavour with minimal break-in time.

The side-fill port is another practical upgrade — no need to pull the pod out to refill, and the silicone plug seals tightly enough that flooding isn't an issue.

Who Should Buy the G3

The G3 makes sense if you want an upgrade from the G2 without jumping to the full-featured G4, you prefer an OLED display for wattage control, or you're comfortable with integrated pod coils and don't mind replacing the whole pod rather than just the coil.

Limitations to Know

The move to integrated pod coils means slightly higher ongoing costs (you replace the full pod, not just the coil). Airflow is no longer adjustable — it's fixed by the pod's design. If you loved the airflow wheel on the G2, that's a genuine step back.

Uwell Caliburn G4 — The Current Generation Leader

Specs at a Glance

What Makes the G4 Stand Out

The G4 is a significant jump — not an incremental update. The battery capacity alone tells the story: 1300mAh is 44% larger than the G3's 900mAh, and in real-world use, that translates to a device that comfortably gets most vapers through a full day without reaching for a cable.

The full-colour screen is sharp and easy to read, and the two output modes give the G4 a genuinely unique personality:

• Storm mode delivers power in a controlled burst at the start of the draw, tapering off — it's designed for a warmer, more intense hit.
• Waves mode varies power in a pulse pattern throughout the draw, giving a softer, more consistent experience.

Neither mode is gimmicky. They produce a meaningfully different feel, and which one you prefer will come down to personal taste.

The GPP (G Pod Platform) pod system launched alongside the G4 is also worth understanding. GPP pods use ultrasonic welding for a tighter bottom seal, and a redesigned U-shaped airflow channel that reduces resistance. The G4 is fully backwards compatible with G3 pods, so if you're upgrading, your existing pod supply doesn't go to waste.

Uwell also built in U² technology, which heats coils more evenly to reduce hotspots — a practical improvement that extends pod life noticeably.

USB-C charges the G4 to full in about 45 minutes, which is fast for a 1300mAh battery.

Who Should Buy the G4

The G4 is the right pick if you want the most capable pod device in the Caliburn range, you value battery life above all else and hate charging mid-day, you want a colour display with mode options, or you're already using G3 pods and want to upgrade without changing your pod supply.

Limitations to Know

At a higher price point than the G2 and G3, it's an investment. The colour screen and mode controls add a small learning curve compared to the simplicity of the G2. Airflow is still not adjustable — pod-controlled only, like the G3.

Side-by-Side Comparison

Pod and Coil Compatibility — What You Need to Know

One of the smartest things Uwell has done with the G range is maintain cross-generation pod compatibility. Here's the quick guide:

• G2 coils fit any device that uses the Caliburn G2 pod (G, G2, GK2 range)
• G3 pods fit all G3-series devices AND all G4-series devices
• GPP pods also fit all G3 and G4-series devices — this is the newer format Uwell is building around for future releases

If you own a G3 and upgrade to a G4, every pod you've already bought will still work. That's a significant advantage when choosing which generation to invest in.

The 0.4Ω GPP pod is worth noting — it wants at least 20–25W to run properly, so it's best used on the G4 (which maxes at 35W) rather than the G3 (which tops at 25W). Stick to 0.6Ω and above on the G3 for the best experience.

So, Which Caliburn Is Right for You?

Buy the G2 if: you're new to pod vaping or on a tighter budget, you want replaceable coils for lower ongoing costs, and you prefer a simple, no-screen device with adjustable airflow.

Buy the G3 if: you want a screen and variable wattage without the cost of the G4, you're happy with integrated pod coils, and all-day battery life on moderate usage isn't a concern.

Buy the G4 if: you want the best the Caliburn range has to offer right now, battery life is a priority, and you want colour display and mode control in a compact form factor. The backwards compatibility with G3 pods makes upgrading painless.

Final Verdict

The Caliburn G line has earned its reputation. Each generation is genuinely better than the last — not just in spec sheets, but in real-world feel. The G2 remains a solid entry-level pick, the G3 hits a sweet spot for vapers who want more without complexity, and the G4 is the definitive version of what a pod system can be in 2025.

For most vapers in South Africa who want a device they'll use daily and rely on, the G4 is the smartest investment — the battery alone justifies the upgrade. But if budget is the deciding factor, the G2 and G3 both deliver Uwell's signature flavour quality without compromise.

Pro Tip — Uwell Caliburn: When installing a new coil in your Caliburn G2, or a fresh G3/G4 pod, add a few drops of e-liquid directly onto the coil or pod inlet and let it sit for 5 minutes before vaping. This primes the coil properly and prevents any dry hits during break-in.