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The Uwell Caliburn G4 Pro Koko is the first Koko with a touchscreen. and it pairs that 2.0" shatterproof display with the largest battery in the Caliburn lineup at 2000mAh. The Koko form factor puts the battery parallel to the board instead of stacked underneath, creating a shorter, wider device that sits comfortably in the palm and fits easily in a pocket or purse. 35W max output, 3 vaping modes (Storm, Waves, Custom), stepless airflow, and full GPP + G3 pod compatibility. Available in 8 colours.
Quick Links: Caliburn G4 Pro (pen style) · Vaporesso XROS Pro 2
| Spec | Details |
|---|---|
| Battery | 2000mAh (integrated, rechargeable) |
| Max Output | 35W |
| Display | 2.0" shatterproof touchscreen |
| Charging | USB-C, 5V/2.5A fast charge |
| Activation | Draw-activated + button fire |
| Airflow | Stepless rotary ring on pod base (MTL to RDL) |
| Pod Capacity | 3mL (side-fill, no removal needed) |
| Included Pods | 0.4Ω + 0.6Ω GPP pods |
| Compatible Pods | All Caliburn GPP pods (0.4Ω/0.6Ω/0.9Ω/1.2Ω) + G3 pods |
| Material | Zinc alloy + aluminum + PCTG |
| Dimensions | 85.8mm × 50mm × 23mm |
| Weight | ~93g |
| Flavour Tech | PRO-FOCS 4.0 |
| Vaping Modes | Storm (strong hits) / Waves (smooth) / Custom (adjustable power curve) |
| UI Themes | 5 (blind-draw unlock system) |
| Languages | 8 supported |
| E-Liquid Compatibility | Salt nic and freebase |
The "Koko" in Uwell's naming means a box-shaped design where the battery sits parallel to the circuitry rather than stacked below it. The result is a device that's shorter than a pen-style kit (85.8mm vs. 120.7mm for the G4 Pro) but slightly wider. For many vapers, this shape is more natural to hold and easier to carry in a pocket, purse, or palm.
The trade-off for that compact shape is weight. at 93g, the Koko is heavier than the pen-style G4 Pro (78g). But it also packs a 2000mAh battery vs. the Pro's 1800mAh, making it the highest-capacity device in the entire Caliburn range.
The G4 Pro Koko shares the same core internals as the G4 Pro: the same 35W output, the same 3 vaping modes (Storm, Waves, Custom), the same PRO-FOCS 4.0 flavour technology, the same GPP + G3 pod compatibility, and the same U² anti-leak system. The differences are the form factor, battery size (2000mAh vs. 1800mAh), screen size (2.0" vs. 2.51"), and the theme system (5 blind-draw themes vs. 6 standard themes).
1× Uwell Caliburn G4 Pro Koko device · 1× 0.4Ω GPP pod · 1× 0.6Ω GPP pod · 1× User manual
The G4 Pro Koko works with all Caliburn GPP pods (0.4Ω, 0.6Ω, 0.9Ω, 1.2Ω) and G3 pods. the same pod ecosystem as every modern Caliburn. Side-fill design means you refill without removing the pod.
Salt nic (10–20mg) pairs best with 0.6Ω and above for MTL. Freebase (3–6mg) works well with the 0.4Ω pod for RDL. Browse our salt e-liquids and freebase e-liquids.
| Feature | G4 Pro Koko | G4 Pro |
|---|---|---|
| Form Factor | Box (palm-sized) | Pen (slim) |
| Battery | 2000mAh | 1800mAh |
| Screen | 2.0" touchscreen | 2.51" touchscreen |
| Max Output | 35W | 35W |
| Weight | 93g | 78g |
| Dimensions (height) | 85.8mm (shorter) | 120.7mm |
| Vaping Modes | Storm / Waves / Custom | Storm / Waves / Custom |
| UI Themes | 5 (blind-draw) | 6 (3 + 3 unlockable) |
| Pods | GPP + G3 | GPP + G3 |
| Choose If… | You want more battery and a compact shape | You want a bigger screen and lighter weight |
| Feature | G4 Pro Koko | G4 Pro | XROS Pro 2 |
|---|---|---|---|
| Battery | 2000mAh | 1800mAh | 2000mAh |
| Weight | 93g | ~78g | 65g |
| Max Wattage | 35W | 35W | 30W |
| Screen | 2.0" touchscreen | 2.51" touchscreen | 0.96" TFT |
| Form Factor | Box (Koko) | Pen | Pen (slimmest) |
| Vaping Modes | Storm / Waves / Custom | Storm / Waves / Custom | Power / ECO |
| Puff Tracking | Counter | Counter | Daily + weekly charts |
| Best For | Box form, biggest battery | Biggest screen, most control | Lightest weight, all-day battery |
Ships within 48 hours · Estimated delivery Jun 24 - Jun 29
US$40
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