Summary:
The G4 Mini by UWell is a lightweight pod system with an 1100 mAh battery. It has a customizable output of up to 35W, offers fast charging via USB-C, and provides surprisingly robust flavour for a device that nearly fits in the palm of your hand.
Introducing the UWell Caliburn G4 Mini
UWell’s new Caliburn G4 Mini is a slightly smaller version of the well-loved Caliburn G4. This version loses a few of the bells and whistles on its larger counterpart (like the touchscreen), but it more than delivers where it counts—offering surprisingly powerful flavour for such a small device.
If you’re looking for a highly portable, no-nonsense pod system at an approachable price point, the G4 Mini is a solid choice. This review from our team at U Vape goes into detail about unboxing, setting up, charging, and using this device so that you know exactly what to expect if you decide to try it for yourself.
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Pros
- Compact and lightweight
- Larger battery than other small devices
- Customizable airflow and wattage
- U² technology helps extend the lifespan of pods
- Strong flavour through Pro-FOCS 4.0 technology
- Budget-friendly price
Cons
- No display screen
- No advanced features or special mode options
- Integrated coils means the whole pod needs replacing
Ratings
- Build Quality & Design: 3.5/5
- Value: 4/5
- Usability: 4.5/5
- Battery & Charging: 4.5/5
- Overall Rating: 4.125 stars
UWell Caliburn G4 Mini Device Key Features
| Feature | Details |
|---|---|
| Dimensions | 110mm x 24mm x 14mm |
| Battery capacity | 1100 mAh |
| Output | 35W Max |
| e-Liquid capacity | 2 mL |
| Charge type | USB-C |
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What’s in the UWell Caliburn G4 Mini Device Kit?
The Caliburn G4 Mini Device Kit comes with:
- 1 x Caliburn G4 Mini Pod System
- 1 x 0.6 ohm Caliburn G3 Pod
- 1 x Type-C Charging Cable
- 1 x User Manual
Read More: UWell Caliburn G4 Unboxing + Review
First Impressions of the UWell Caliburn G4 Mini Device
When you compare the G4 Mini to the G4, you’ll notice the absence of the HD screen—just one of the perks you’re paying for with the higher-priced G4 device. However, the G4 Mini does have a LED battery life indicator light—so you’ll always know when you’re running low on battery and need to charge it back up again.
On the plus side, the body of the mini is significantly easier to hold—the whole thing nearly fits into the palm of your hand—and it weighs less as well, making it a practical on-the-go device for when you’re travelling. The zinc alloy it’s made from seems highly durable as well, which is definitely confidence-inspiring.
Key Points:
- Easy to hold and lightweight
- Made of smooth, durable zinc-alloy
Charging the UWell Caliburn G4 Mini for the First Time
As with other UWell products, the Caliburn G4 Mini utilizes fast, on-the-go USB-C charging. You’ll find the charging port on the side of the device. This is kind of a nice touch, since it allows you to stand the device up during charging (which looks a lot better than lying it down on its side).
It only takes about 45 minutes to recharge the battery using the supplied charger. Once you do, it should be able to last a full day without needing a second charge for most users.
Preparing the Pod in the UWell Caliburn G4 Mini
You may have noticed that the Caliburn G4 Mini is similar to its predecessor in that it’s also compatible with the Caliburn G3 pods. That means you can now use the G3 pod system across several different UWell vapes—including the Caliburn G3, G4 and G4 Mini.
This is a nice touch that makes the whole range of products feel more buyer-friendly. It also means that the pods you’ll use in the G4 Mini still come with U² technology, which significantly enhances leak-resistance and helps extend their lifespan.
Order G3 replacement pods for your device here.
Filling the pod is easy—you don’t even need to remove it from the device. Just remove the silicone filling plug, insert the nozzle of your e-liquid container, and you’re good to go.
Just make sure to leave your freshly-filled pod for a few minutes before you start using it so that the e-liquid can saturate the coil properly.
Key Points:
- Utilizes the Caliburn G3 pod system
- U² technology helps extend the pod’s lifespan
Using the UWell Caliburn G4 Mini
Draw Quality & Taste
The Caliburn G4 Mini keeps things simple—no buttons or complicated controls to dial in here. It’s draw-activated, so you just put your lips around the mouthpiece and inhale.
The mouthpiece is pretty standard here—comfortable, but nothing groundbreaking. Where this device really shines is in the flavour department.
UWell advertises a 35% boost in “flavour satisfaction” with the G4 mini—and while that seems like a pretty hard metric to verify objectively, we can confirm that this thing packs a very powerful punch, thanks to the Pro-FOCS 4.0 technology it uses.
Airflow Controls
Just like the Caliburn G4, the G4 Mini has easy adjustable airflow control. There are several different ways to make adjustments to your vape device:
- Option 1: Load the cartridge in different orientations into the body. Turning the pods one way allows for a more open draw aimed at RDL users, whereas flipping it in the other direction closes off the airflow for more MTL-style vaping.
- Option 2: Slide the airflow valve to adjust the airflow. This provides more granular control over how much air is flowing through the mouthpiece on each draw.
- Option 3: Combine the above-mentioned two ways to adjust airflow. You can use the slider to increase or decrease airflow when the cartridge is in either position—which opens up a whole range of possibilities.
We found the G4 mini particularly impressive with the 0.6 coil inserted on the tighter airflow setting, and with the airflow slider all the way open. This provided an exceptional MTL draw, with rich flavour and particularly dense clouds.
You can adjust the wattage here too, from 5–35W. You’ll want to keep it over 20W or so if you’re going for more of an RDL experience, and use lower power for your MTL draws.
Device Battery Life & Performance
One of the most impressive things about the Caliburn G4 Mini is the battery size and wattage output. For a compact vape device, the G4 Mini carries a pretty reliable 1100 mAh battery that can go most of the day without charging as long as you’re vaping moderately and not hitting it all the time. It’s a bit smaller than the battery in the G4 (1300 mAh), but a bit larger than what’s in the G3 (900 mAh).
Key Points:
- Big flavour for a small vape
- Large battery life for its size
- Lots of customization in terms of airflow and output
Pro Tips for Using the G4 Mini
Here’s what you should do to get the most out of your experience using the G4 Mini:
- Stick to MTL or tight RDL: These are really what the G4 mini is designed for. Use 0.9 Ω–1.2 Ω pods for MTL with nic salts; 0.6 Ω–0.8 Ω for warmer RDL with freebase.
- Adjust airflow both ways: Rotate the pod + use the side slider to get the airflow just right for you. Closed gets you a tighter draw and stronger throat hit; open delivers smoother inhales and bigger clouds.
- Use thinner juice: 50/50 or 60/40 VG/PG blends work best—thick e-liquids can burn your coils and force you to replace your pod faster.
- Pause between puffs: Wait 10–15 seconds to let the wick re-saturate, especially on low-ohm pods.
- Refill early: Top off your pods at ~25% to avoid dry hits and extend coil life.
- Store upright: Prevent leaks by standing the device up when not in use.
- Charge from red, not dead: Plug your device in as soon as you notice the LED turn red, as this will help with battery longevity.
Should You Buy the G4 Mini?
The G4 Mini keeps most of what’s great about the full-size G4. If your main concerns are performance and usability, you probably won’t miss much in this stripped-down version.
Who It’s For: Beginners, commuters, or users looking to downsize their current devices without sacrificing flavour.
Buy it if: You want a reliable, user-friendly pod system for everyday MTL or light RDL vaping.
Skip it if: You want a screen, vaping modes, or more advanced features—or if you prefer sub-ohm, open airflow, or cloud-focused setups.
Frequently Asked Questions About the Caliburn G4 Mini
Here are some answers to common questions we get about the G4 Mini. You can find a more in-depth FAQ including troubleshooting info and more on this device’s product page.
Does the Caliburn G4 Mini Have Its Own Pod System?
No, the Caliburn G4 Mini uses the G3 pod system, meaning you don’t have to adapt to a new ecosystem. One 0.6 ohm Caliburn G3 pod comes with your Caliburn G4 Mini device kit.
How Often Does the Pod Need to be Replaced?
For moderate vape users, each pod should last about a week. If you start tasting a burnt flavour, it’s time to replace the device. You can order new pods here.
What Are the Key Differences Between the Caliburn G4 and the G4 Mini?
| G4 Mini | G4 | |
|---|---|---|
| Dimensions | ~112.7×24.1×14 mm | ~114.98×26×15.65 mm |
| Weight | 46 g | 54.7 g |
| Screen | None | 0.85″ TFT color screen with themes & brightness |
| Battery | 1100 mAh | 1300 mAh |
| Vaping Modes | Single preset mode (auto-draw) | Two modes: Storm & Wave |
What are the Colour Options for the Caliburn G4 Mini?
The Caliburn G4 Mini comes in 6 colours, including:
- Bright Pink
- Grass Green
- Lake Blue
- Light Silver
- Night Black
- Slate Grey
Final Thoughts on the UWell Caliburn G4 Mini
If you’re looking for a compact, easy-to-use device that balances simplicity and performance, the Caliburn G4 Mini is worth exploring. We give it props for everything hidden inside the body: the large battery (compared to others of its size), plus adjustable airflow and a wide wattage range for a flavourful, customizable experience. It’s a good device for both beginners and experienced vapers that want something portable and pocket-friendly.
If you want more information on this device or anything else we sell, contact the U Vape team. We’re happy to answer any questions you have so that we can help you enjoy the best possible vaping experience for your style and preferences.
