UWell Caliburn G4 Mini: Unboxing & Full Review
Summary: The UWell Caliburn G4 Mini is a compact pod system packing a 1100 mAh battery, adjustable output up to 35W, and USB-C fast charging. For a device that practically disappears in your hand, it delivers a flavour experience that punches well above its weight.
Meet the UWell Caliburn G4 Mini
The Caliburn G4 Mini is UWell's streamlined take on the already-popular Caliburn G4. It trades a few premium touches — most notably the touchscreen — for a smaller, more pocket-friendly form factor, while holding its own where it matters most: flavour performance.
If you're after a portable, hassle-free pod system that won't break the bank, the G4 Mini makes a compelling case for itself. The VapeBest team has put together this comprehensive walkthrough — covering unboxing, setup, charging, and everyday use — so you know exactly what you're getting before you buy.
👉 Browse our full range of UWell products
Pros & Cons
Pros
- Slim, lightweight build that travels effortlessly
- Larger battery than most devices in its size category
- Fully adjustable airflow and wattage output
- U² technology for improved leak resistance and longer pod life
- Pro-FOCS 4.0 technology delivers rich, satisfying flavour
- Competitively priced for what it offers
Cons
- No display screen
- No advanced modes or special vaping features
- Integrated coil design means replacing the entire pod, not just the coil
Ratings
Key Specifications
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What's in the Box?
Your G4 Mini kit includes:
- 1 × Caliburn G4 Mini Pod System
- 1 × 0.6 ohm Caliburn G3 Pod
- 1 × Type-C Charging Cable
- 1 × User Manual
📖 Further reading: Uwell Caliburn G4 Pro Pod Kit Review: Power, Style and Smart Control
Unboxing
First Impressions
Side by side with the G4, the most obvious difference is the missing HD display — a feature reserved for the higher-priced model. What the G4 Mini does offer is an LED battery indicator, keeping you informed of your charge level so you're never caught off guard.
On the upside, the Mini's smaller footprint genuinely improves the holding experience — it nearly disappears in the palm of your hand and feels noticeably lighter during extended use. The zinc alloy construction feels robust and smooth, which gives the device a sense of durability that's reassuring for daily carry.
Key Highlights:
- Comfortable, palm-friendly grip
- Durable, smooth-finish zinc alloy body
Charging
Like other devices in UWell's lineup, the G4 Mini supports USB-C fast charging via a port on the side of the device. This placement is a thoughtful touch — it lets you stand the device upright while it charges, which is far tidier than laying it on its side.
A full charge from empty takes roughly 45 minutes with the included cable. Once topped up, most moderate users will comfortably get through a full day on a single charge.
Pod Setup & Filling
One of the more user-friendly aspects of the G4 Mini is its compatibility with the Caliburn G3 pod system — the same pods used across the G3 and G4 as well. This cross-device compatibility makes replacing pods straightforward and cost-effective.
These pods also carry UWell's U² technology, which significantly reduces the risk of leaks and helps extend overall pod lifespan.
👉 Order replacement G3 pods here
Filling is refreshingly simple — no need to remove the pod from the device. Just pull out the silicone plug, insert your e-liquid bottle nozzle, and fill up.
One important note: after filling, give the pod a few minutes to sit before vaping. This allows the e-liquid to saturate the coil properly and prevents dry hits.
Key Highlights:
- Uses the widely compatible Caliburn G3 pod system
- U² technology minimises leaks and extends pod life
Performance & Daily Use
Draw Quality & Flavour
The G4 Mini keeps operation refreshingly simple — no buttons, no menus, just draw-activated vaping. Put the mouthpiece to your lips and inhale.
The mouthpiece itself is functional and comfortable without being particularly distinctive. Where the device truly earns its stripes is in the flavour department.
UWell claims a 35% boost in flavour satisfaction — a figure that's admittedly difficult to measure objectively — but thanks to Pro-FOCS 4.0 technology, we can say the flavour output genuinely impressed us and exceeded our expectations for a device this small.
Airflow Adjustment
Just like the full-size G4, the Mini offers flexible airflow control through three distinct methods:
Method 1 — Pod orientation: Insert the pod in one direction for a more open, RDL-friendly draw; flip it around to tighten the airflow for a classic MTL experience.
Method 2 — Airflow slider: The side-mounted slider provides fine-tuned control over how much air flows through with each puff.
Method 3 — Combine both: Use the slider in conjunction with either pod orientation to dial in a much wider range of draw styles than either adjustment alone would allow.
In our testing, the best results came from pairing the 0.6 ohm pod in the tighter orientation with the slider fully open — delivering an exceptional MTL draw with dense, flavour-packed vapour.
Wattage is adjustable between 5W and 35W. For RDL vaping, staying above 20W tends to work best; MTL sessions are generally more enjoyable at lower wattage settings.
Battery Life & Overall Performance
Battery life is arguably one of the G4 Mini's most impressive qualities relative to its size. The 1100 mAh cell holds up well through a full day of moderate use without needing a mid-day top-up. It sits between the G3's 900 mAh and the G4's 1300 mAh — a sensible middle ground for a device this compact.
Key Highlights:
- Outstanding flavour output for such a small device
- Strong battery life relative to its form factor
- Versatile customisation of both airflow and power output
Pro Tips for Getting the Most Out of Your G4 Mini
- Stick to MTL or light RDL: That's what this device was built for. Use 0.9Ω–1.2Ω pods with nic salts for MTL; 0.6Ω–0.8Ω pods with freebase for a warmer RDL experience.
- Use both airflow adjustments together: Rotating the pod and using the side slider in combination gives you far more control than either method alone.
- Go for thinner e-liquids: 50/50 or 60/40 VG/PG blends work best. High-VG juices can cause the coil to burn out faster.
- Pause between puffs: Especially with lower-resistance pods — waiting 10–15 seconds lets the wick re-saturate and prevents dry hits.
- Refill before it runs dry: Topping up at around 25% remaining helps protect the coil and extends pod life.
- Store the device upright: Keeping it vertical when not in use reduces the chance of leaks.
- Charge when the LED turns red: Don't wait until the battery is completely dead — charging from low (not empty) helps preserve long-term battery health.
Should You Buy the G4 Mini?
The G4 Mini successfully carries over the best parts of the full-size G4. If performance and ease of use are your top priorities, the tradeoffs in this stripped-back version are unlikely to bother you.
Who it's best for: Beginners, commuters, and vapers looking to downsize without giving up flavour quality.
✅ Buy it if you want a dependable, low-maintenance pod system for everyday MTL or light RDL vaping.
❌ Skip it if you need a screen, multiple vaping modes, or advanced features — or if you prefer sub-ohm, wide-open airflow, or maximum cloud production.
Frequently Asked Questions
Does the Caliburn G4 Mini use its own pod system?
No — it uses the Caliburn G3 pod system, so there's no new ecosystem to get used to. One 0.6 ohm G3 pod is included in the kit.
How long does each pod last?
For moderate users, expect around one week per pod. When you start noticing a burnt taste, that's your cue to swap it out. 👉 Pick up replacement pods here
What are the main differences between the G4 and the G4 Mini?
What colours does the Caliburn G4 Mini come in?
The G4 Mini is available in 6 colour options:
- Bright Pink
- Grass Green
- Lake Blue
- Light Silver
- Night Black
- Slate Grey
Final Verdict
The Caliburn G4 Mini makes a strong case for anyone who wants a compact, easy-to-use device that doesn't skimp on performance. Its above-average battery, customisable airflow, and wide wattage range come together in a package that's both practical and genuinely enjoyable to use — whether you're a first-time vaper or a seasoned user looking for something more pocket-friendly.
For any questions about this device or anything else in our range, don't hesitate to reach out to the VapeBest team. We're here to help you find the right fit for your vaping style.
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