UWELL’s Caliburn G4 is the most sophisticated addition yet to the legendary Caliburn line, seamlessly blending enhanced customisation with the simplicity the series is known for.
UWELL Caliburn G4 Specifications:
- Battery Capacity: 1 300 mAh
- Power Output: 5–35 W (Smart & Storm modes)
- Charging: USB‑C, up to 2 A
- Screen: 0.85″ full-colour OLED with three theme options
- Pod Capacity: 3 ml (2 ml TPD)
- Coil Compatibility: GPP pods (G3 compatible) — 0.6 Ω & 0.9 Ω options
- Airflow: Dual adjustable via side slider + pod orientation
- Activation: Button + inhale
Visually, it strikes a modern chord: lightweight at around 55 g, with smooth aluminium-alloy construction and a curved chassis that sits comfortably in the hand.
The 0.85″ colour OLED display, while modest in size, offers clear visibility of power modes, battery life, puff count and themes, ideal for those wanting a bit of flair without overcomplication.
Battery life sees a tangible upgrade at 1 300 mAh, roughly thirty-five percent more than its predecessor, easily lasting a full day of moderate vaping.
Recharging is impressively fast, with the USB‑C port restoring a full charge in around forty to forty-five minutes.
Performance-wise, the G4 delivers crisp, consistent flavour via its PRO‑FOCS 4.0 coils, compatible with the existing G3/GPP ecosystem.
The 0.6 Ω pod offers a punchier RDL experience at 25 W, while the 0.9 Ω pod suits tighter MTL draws.
Dual airflow control, through the side slider and pod orientation, gives genuine flexibility that elevates the inhale quality beyond most similar kits.
Two vaping modes bring subtle nuance: Storm provides a bolder, more instantaneous hit, while Wave offers a softer, gentler draw.
Though neither mode is game-changing, they add helpful choice without complication.
The refill mechanism is smart and leak‑resistant, thanks to U² ultrasonic welding and pods last well, with many users reporting one to two weeks of use depending on vaping habits.
The only minor frustrations lie in the screen’s small size — it can be hard to read in bright light — and the sight window in pods can be tricky to see in low light.
A couple of UI settings are hidden behind multi-clicks, but once you’re accustomed to the layout, operation remains simple.
Overall thoughts on the UWELL Caliburn G4
The UWELL Caliburn G4 is a solid addition to the Caliburn lineup, offering excellent flavor, dependable cross-compatibility, and a sleek, accessible design.
While battery life and minor build quirks hold it back slightly, its portability, durability, and pod quality more than make up for these drawbacks. It’s a versatile option that caters to both beginners and seasoned vapers alike.
With future iterations likely on the horizon, the G4 sets a strong foundation for what’s to come. If you’re a fan of the Caliburn series or seeking a reliable daily vape, the G4 is well worth considering.
Pros:
- Excellent flavour and vapour from upgraded PRO‑FOCS 4.0 coils
- Flexible airflow via both slider and pod orientation
- Clear, stylised display and Rapid 45‑minute USB‑C charging
- GPP pod compatibility offers choice and longevity
- Smart & Storm modes add user variety
Cons:
- Screen can be tough to read in direct sunlight
- Pod juice window isn’t fully transparent
- Slightly larger than previous Caliburn models
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