In this review, I’ll be looking at the UWELL Caliburn G4, the latest evolution in the beloved Caliburn pod vape series.
It’s already making waves among vapers of all experience levels, and for good reason.
UWELL has taken everything that made previous Caliburns popular and added some serious upgrades.
The most noticeable improvements include a vibrant 0.85″ HD color screen, a larger 1300mAh battery, and advanced Pro-FOCS 4.0 Flavour Technology.
Almost every reviewer agrees – this device delivers exceptional flavor, consistent performance, and user-friendly operation.
Whether you’re just starting your vaping journey or looking for a reliable daily carry, the G4 deserves your attention.
The device is crafted from durable metallic aluminum alloy, giving it a premium yet lightweight feel in hand.
It supports both mouth-to-lung (MTL) and restricted direct-to-lung (RDL) vaping styles.
This versatility comes from the included 0.4ohm and 0.9ohm G3 pods, plus precise adjustable airflow control via a slider and pod orientation.
You get two power modes – Storm and Waves – letting you customize your experience.
The dual activation feature (draw or button) adds another layer of flexibility to suit your preferences.
UWELL’s leak-resistant pods use their U² technique for enhanced durability.
The top-fill design means no more removing pods to refill – a small but significant quality-of-life improvement.
Fast USB-C charging (5V/2A) gets the 1300mAh battery back to full in about 30 minutes.
I’m also happy to report that the G4 remains compatible with CALIBURN GPP cartridges and G3 series pods.
All these features come wrapped in a sleek, minimalist package with a clear-view juice window and dynamic theme UI.
While a few users noted minor issues with battery life and finish, the overall sentiment is overwhelmingly positive.
This is a pod system that truly delivers on both flavor and convenience.
Build Quality and Design
The UWELL Caliburn G4 sports a sleek, minimalist “pen-style” design that immediately catches the eye.
It feels both modern and familiar in my hand.
The compact form factor is perfect for slipping into a pocket or purse.
I’m impressed by the durable metallic aluminum alloy construction.
It gives the device a lightweight yet robust feel that’s ideal for on-the-go use.
The chassis has a smooth, subtly contoured surface with rounded edges.
This thoughtful design makes it comfortable to hold during extended vaping sessions.
One feature I particularly appreciate is the clear-view juice window integrated into the body.
It lets me easily monitor my e-liquid level without removing the pod – a small touch that makes daily use much more convenient.
Front and center sits a thumb-sized 0.85″ HD color screen that’s bright and crisp.
It displays all essential information including battery life, power mode, and puff count.
The dynamic theme options and adjustable brightness add a touch of personalization without being over the top.
Just below the screen is the single firing button, which sits flush with the body.
It doubles as both power and activation control.
I love that the device supports both draw-activation and button firing, catering to different preferences.
The precise airflow slider on the side lets me fine-tune my draw from tight MTL to a looser RDL experience.
The USB-C charging port is neatly positioned at the base for easy access.
The G4 comes in several attractive colorways, including Karst Grey, Flamingo Red, Glacier Blue, and Seashell White.
Each has a matte metallic sheen that resists fingerprints and enhances the premium feel.
While most users praise the build quality, a few have mentioned that the surface can feel slightly tacky after prolonged handling.
The enhanced leak-proof pod design, achieved through UWELL’s U² ultrasonic welding and U-shaped channel technique, further boosts confidence in its longevity.
Overall, the Caliburn G4 stands out as a refined, user-friendly device with just enough visual flair to set it apart from the crowd.
Performance
I’ve been using the Caliburn G4 extensively, and I’m genuinely impressed with its performance.
UWELL has really nailed the flavor delivery with their Pro-FOCS 4.0 technology.
Every e-liquid I’ve tried comes through vibrant and true to taste.
This holds true whether I’m using the 0.4-ohm pod for a restricted direct lung hit or the 0.9-ohm for a classic MTL draw.
Having both pods included in the box is a nice touch that lets you experiment right away.
The adjustable airflow slider is one of my favorite features.
It allows me to fine-tune the draw exactly to my liking, from a tight cigarette-like pull to a more open, airy experience.
The dual power modes (Storm and Waves) add another layer of customization.
Honestly though, I found the default output already spot-on for both flavor and vapor production.
The draw is consistently smooth, and the vapor is surprisingly dense for a pod system.
I’m particularly impressed with the leak-proof design – it actually works!
No more messy pockets or sticky fingers, which has been a common issue with other pod systems I’ve tried.
Coil longevity is another strong point.
I’ve put the G4 through daily use, and the coils are still performing well after multiple refills.
There’s been no noticeable drop-off in flavor or performance.
My only real complaint is the lack of adjustable wattage.
You’re locked into the preset outputs, which might limit some users.
That said, the device seems so well-tuned that I haven’t really missed this feature.
All things considered, the Caliburn G4 delivers exactly what I want from a pod vape: reliable, flavorful, and hassle-free performance that holds up over time.
Battery Life and Charging
The UWELL Caliburn G4 comes equipped with a 1300mAh built-in battery, which is a significant upgrade over previous Caliburn models.
This places it among the higher-capacity pod vapes in its class.
UWELL advertises 5V/2A USB-C fast charging, claiming a full charge in approximately 30 minutes.
For a device of this size, I’d expect the usable battery capacity to be around 1050-1100mAh (roughly 80-85% of the listed figure).
A true 2A charge rate would be impressive, as most pod systems typically deliver 1-1.5A in real-world use.
In my daily testing, the G4’s battery life proved sufficient for a full day of moderate vaping.
This aligns with what UWELL claims in their marketing materials.
However, I did notice that the actual runtime felt slightly shorter than expected compared to other devices with similar specs.
I also found that the battery percentage display didn’t always accurately reflect the remaining charge.
The fast charging feature, however, is genuinely impressive.
I consistently achieved a full charge in about 30-35 minutes, which is excellent for a 1300mAh battery.
This quick top-up time means even heavy users will rarely be left waiting long.
The color screen provides clear charging status indicators, making it easy to see when you’re good to go.
Overall, the Caliburn G4 delivers on its promise of fast, convenient charging.
For most users, the battery life will be more than adequate for all-day use.
A small minority might find the actual runtime slightly underwhelming relative to the listed capacity.
The rapid recharge and user-friendly charging indicators are standout features that make the G4 a strong choice for vapers who prioritize minimal downtime.
Pros and Cons
Pros:
– Superb flavor with Pro-FOCS 4.0 technology
– Large 1300mAh battery with fast USB-C charging
– Bright 0.85″ HD color screen with dynamic UI
– Leak-resistant, top-fill pods with U² welding
– Adjustable airflow for MTL and RDL vaping
– Dual power modes and dual activation (draw/button)
– Compatible with G3 and GPP pods
– Sleek, durable aluminum alloy build
– Clear-view juice window for easy monitoring
Cons:
– No adjustable wattage—preset outputs only
– Some users report battery life slightly below expectations
– Surface finish can feel tacky or greasy after extended use
– Battery percentage display may be inaccurate on some units
Final Thoughts
The UWELL Caliburn G4 stands out as a thoughtfully refined pod vape that hits all the right notes.
It successfully blends premium build quality, vibrant flavor, and user-friendly features into a compact, stylish package.
The robust 1300mAh battery and fast USB-C charging ensure you’re never without power for long.
UWELL’s advanced Pro-FOCS 4.0 flavor technology delivers a consistently satisfying experience that rivals much larger devices.
This holds true whether you prefer mouth-to-lung or restricted direct-lung vaping.
I particularly appreciate the bright HD color screen, precise adjustable airflow, and genuinely leak-resistant pods.
These features elevate the daily usability far beyond what most pod systems offer.
The device’s compatibility with previous G3 and GPP pods is also a welcome touch for those upgrading from earlier models.
While I did notice some minor quirks—such as the slightly tacky finish and battery life that doesn’t always match the impressive specs—these are small complaints in the grand scheme.
The overall experience is overwhelmingly positive, with the G4’s balance of performance, convenience, and style making it a standout in its category.
I can easily recommend the Caliburn G4 to both beginners seeking a reliable, intuitive starter kit and experienced vapers looking for a portable, flavorful daily driver.
Its combination of smart upgrades, robust battery, and hassle-free operation make it one of the most compelling pod systems available today.
If you value great taste, fast charging, and a sleek, modern design, the Caliburn G4 is absolutely worth adding to your collection.