Uwell Caliburn G4 Classic Pod Kit
The Uwell Caliburn G4 Classic Pod Kit is the most premium expression of the Caliburn G4 platform, combining a decade of design refinement with cutting-edge engineering. A uni-body CNC-machined aluminium frame with a zirconia-smooth surface sits at the heart of the Classic, while 14 miniature RGB LEDs create a dynamic ambient light display that changes colour to reflect your remaining battery level. Twin-sensor intelligence ensures 99.999% trigger accuracy and a 300% longer auto-draw lifespan than conventional systems. The 2ml refillable pod uses PRO-FOCS 4.0 flavour technology through CALIBURN GPP coils, with stepless dual airflow control and the unique convenience of refilling without removing the pod.
Precision Engineered. Beautifully Lit.
CNC Precision Machining and Zirconia-Smooth Surface
The G4 Classic body is machined from high-quality aluminium with a uni-body winged streamline profile. The zirconia-smooth surface treatment delivers a premium tactile feel that sets it apart from injection-moulded pod kits.
14 RGB LEDs with Dynamic Ambient Lighting
A ring of 14 miniature RGB LEDs illuminates dynamically as you vape and changes colour to indicate battery level: Emerald Green for a full charge, Sapphire Blue for mid-range, and Ruby Red when the battery is running low.
Twin-Sensor Intelligence
A primary sensor and a backup sensor work in parallel with millisecond-level synchronisation, achieving 99.999% trigger accuracy. This redundant system also extends auto-draw lifespan by over 300% compared to single-sensor designs.
PRO-FOCS 4.0 Flavour Technology
The CALIBURN GPP coil platform with PRO-FOCS 4.0 delivers a 35% improvement in flavour satisfaction and a 35% longer coil lifespan than previous Caliburn generations, ensuring every draw is consistently rich and flavourful.
Stepless Dual Airflow with Reversible Cartridge
Two independent airflow controls: a stepless damping slider for precise resistance adjustment and the option to rotate or reverse the cartridge. Together they provide an extremely wide range of draw styles from ultra-tight MTL to a more open inhale.
Refill Without Removing the Pod
The G4 Classic is designed so you can top up your e-liquid directly without pulling out the pod. Combined with the clear-view e-juice window, this makes monitoring and refilling quicker and more convenient than ever.
Four Reasons to Choose the Caliburn G4 Classic
A Decade of Craftsmanship
Founded in 2015, Uwell has spent the better part of a decade refining what a pod kit can be. The original Caliburn set the template for the entire pod kit category, and each generation since has pushed hardware quality and flavour performance further forward. The Caliburn G4 Classic is the brand's most considered homage to that legacy: a device that blends premium materials, intelligent engineering, and Uwell's most advanced coil technology into a single compact package. With products sold in over 100 countries and millions of satisfied vapers worldwide, Uwell continues to put taste and quality above everything else.
Explore More Uwell Pod Kits
How to Use the Uwell Caliburn G4 Classic
Step 1: Power On the Device
Press the button 5 times in quick succession to power on the G4 Classic. The RGB LED ring will illuminate to confirm the device is active and display your current battery level through its colour.
Step 2: Fill the Pod (Without Removing It)
The G4 Classic features an in-device fill system. Locate the fill port on the pod while it is inserted in the device and fill with up to 2ml of e-liquid directly. Reseal the port firmly once filled.
Step 3: Prime the Coil
After filling, wait 5 to 10 minutes to allow the mesh coil to fully absorb the e-liquid before your first draw. This prevents dry hits and gives the coil the best possible start for long-term performance.
Step 4: Adjust the Airflow
Use the stepless airflow damping slider to set your preferred draw resistance. You can also rotate or reverse the cartridge within the device to further refine your airflow, ranging from a tight MTL to a more open inhale.
Step 5: Lock and Unlock as Needed
Press the button twice quickly to lock the device and prevent accidental firing. Press twice again to unlock when you are ready to vape. This prevents the device from activating in a pocket or bag.
Step 6: Check Battery Status
Press the button once to illuminate the RGB LED ring and check your battery level. Emerald Green indicates a full or high charge, Sapphire Blue is medium, and Ruby Red means the battery needs charging soon.
Step 7: Charge via USB-C
When the LEDs show Ruby Red, connect the USB-C cable for fast charging. The 1400mAh battery charges quickly and the LED colour will return to Emerald Green once the battery is full.
⚠️ Before You Buy
- This product is for adults aged 18 and over. Age verification is required at checkout.
- The Caliburn G4 Classic does not include e-liquid. E-liquid is sold separately.
- The pod capacity is 2ml in compliance with UK TPD regulations.
- Contains no nicotine. Nicotine is present only when used with nicotine-containing e-liquid.
- Keep away from water, direct sunlight, and extreme temperatures.
- Keep out of reach of children and pets at all times.
Why Buy From Hulme Vapes?
Frequently Asked Questions
What makes the Caliburn G4 Classic different from the standard G4?
The G4 Classic focuses on premium build quality and hardware innovation. It features CNC-machined aluminium construction with a zirconia-smooth finish, 14 RGB LEDs for visual battery feedback, twin-sensor technology for 99.999% trigger accuracy, and the ability to refill the pod without removing it from the device.
What do the different LED colours mean?
The RGB LED ring on the G4 Classic uses colour to indicate battery level. Emerald Green means the battery is fully charged or at a high level. Sapphire Blue indicates a medium charge level. Ruby Red signals that the battery is running low and the device should be charged soon.
Can I refill the G4 Classic without removing the pod?
Yes. The Caliburn G4 Classic is designed with an in-device fill port, allowing you to top up your e-liquid without pulling the pod out of the device. Simply locate the fill port, fill to the 2ml maximum, and reseal the port.
What pods are compatible with the Caliburn G4 Classic?
The G4 Classic is compatible with all CALIBURN GPP cartridges, including the upgraded G4 range of coils. G3 series pods are also compatible. Available resistances include 0.4ohm (RDTL), 0.6ohm, 0.9ohm (MTL), and 1.2ohm.
How does the twin-sensor system work?
The G4 Classic has both a primary and a backup draw sensor operating simultaneously. They communicate with millisecond-level synchronisation to achieve near-perfect trigger accuracy. If one sensor degrades over time, the other continues working, which is why the auto-draw lifespan is over 300% longer than conventional single-sensor designs.
Is the Caliburn G4 Classic TPD compliant?
Yes. The pod capacity is 2ml, fully complying with UK Tobacco and Related Products Regulations (TPD). All Uwell products sold at Hulme Vapes are UK regulation compliant.
