Welcome to Vape Blaze, where we ignite your vaping experience with the hottest, most innovative hardware on the market. Today, we are turning up the heat on the legendary Caliburn series with a comprehensive deep dive into the Uwell Caliburn GK2 Pod Kit. If you have been seeking a device that blends the cult-classic Koko form factor with the reliable, flavour-forward performance of the Caliburn lineage, your search ends right here. The GK2 is a firecracker – small in stature, but explosive in flavour delivery.

Uwell has listened intently to the vaping community. Vapers consistently asked for a device that was truly pocketable, discreet enough for on-the-go use, yet powerful enough to deliver a satisfying throat hit and dense, flavourful vapour. The answer is the GK2. Measuring just a few centimetres in height and width, this device houses a surprisingly resilient 690mAh battery. That is enough power to get you through a full workday, your commute, and an evening out without scrambling for a charger. And when you finally do need to recharge, the USB-C port delivers a rapid charge, getting you from 0% to 100% with impressive speed. No more waiting around for hours.

But let us talk about the real star of this show: flavour. The Caliburn GK2 features Uwell's latest iteration of their Pro-FOCS (Flavour Obsession Core System) technology. This is not marketing jargon – it is a genuine leap forward in coil and airflow engineering. The system intelligently analyses the e-liquid's behaviour and adjusts the power output to ensure each molecule of flavour is vaporised at its optimal temperature. The result? You taste your strawberry, your menthol, or your custard with a clarity and depth that rivals much larger, more expensive devices. Whether you are vaping 20mg bar salts or a classic 50/50 blend, the GK2 extracts every single nuance.

The design is pure function-forward style. The dazzling steampunk print is not just for looks (though it looks incredible); the textured finish provides a non-slip grip, ensuring your device stays secure in your hand even on a sweaty summer day. Operation is effortlessly intuitive – just inhale on the mouthpiece. The auto-draw sensor is hyper-sensitive, activating instantly the moment you take a puff. For the tinkerers among us, Uwell has added an adjustable airflow wheel on the pod's base. This tiny wheel is an absolute game-changer. Roll it one way, and you get a tight, resistance-heavy draw perfect for mouth-to-lung (MTL) vaping, mimicking the sensation of a traditional cigarette. Roll it the other way, and the airflow opens up for a smoother, airier restricted direct-lung (RDL) vape.

The G2 pod itself is a masterpiece of practical design. Holding a TPD-compliant 2ml of e-liquid, it uses a snap-fit mouthpiece that clicks off with a fingernail to reveal a silicone fill-port. Filling is an absolute breeze, and the leak-resistant technology is genuinely effective – no more sticky pockets or wasted juice. Coil changes are equally simple thanks to the push-to-fit design. You do not need tools or expertise; just pull the old coil out from the bottom of the pod and push a new one in. The kit includes both a 0.8 Ohm and a 1.2 Ohm Caliburn G coil, allowing you to experiment and find your perfect resistance level immediately. These coils are renowned for their longevity, often lasting 10 to 14 days of regular use depending on the e-liquid's sweetener content.

At Vape Blaze, we confidently pair the Uwell Caliburn GK2 with nicotine salts, high-PG e-liquids, and 50/50 blends. It is not designed for thick, high-VG juices, but for the vast majority of ex-smokers and flavour chasers, it is the ultimate daily companion. The fixed 18W output provides a consistently warm, satisfying vape without the risk of burning your coil. Whether you are a seasoned vaper looking for a stealthy backup device or a newcomer wanting a no-fuss, reliable starter kit, the Uwell Caliburn GK2 delivers on every single promise.

Features

690mAh High-Density Battery: Compact lithium-ion cell engineered for maximum capacity in a minimal physical footprint.
Fixed 18W Constant Output: Delivers a stable, unfluctuating power curve from full charge to low battery, ensuring consistent flavour every single puff.
Pocket-Friendly Design: Ultra-compact and lightweight – truly designed to be taken anywhere without weighing you down.
Auto-Inhale Activated: Instant-on inhale activation with a sensitive airflow sensor. No buttons, no menus, no confusion.
Snap-Fit Mouthpiece: Tool-free removal for easy top-filling. Clicks securely back into place.
LED Battery Indicator Light: Single multi-colour LED provides battery charge level feedback without a distracting screen.
2ml Refillable Pods: TPD-compliant capacity. Made from durable, food-grade PCTG material.
Caliburn G Mesh Coils: Compatible with the full Uwell Caliburn G coil family for a wide range of resistances.
Pro-FOCS Flavour Technology: Advanced chipset algorithm that monitors and adjusts power delivery to enhance taste and prevent scorching.
Adjustable Airflow Wheel: Precision mechanical wheel offering stepless adjustment from tight MTL to airy RDL.
Leak-Resistant Architecture: Features a triple sealing system around the coil and fill port to eliminate e-liquid escape.
USB-C Fast Charging: Uses the same cable as modern smartphones and tablets. Supports 5V/1A fast charging.
Dazzling Steampunk Print: Unique, eye-catching design available in eleven stunning colour variants.

Compatibility

Pods: Exclusively designed for the Uwell Caliburn G2 Replacement Pod (2ml). Do not attempt to use original Caliburn or Koko Prime pods.
Coils: Fully compatible with the entire Uwell Caliburn G Coil Family:
- *0.8 Ohm Mesh Coil (15-18W):* Provides warm, dense flavour. Best for 50/50 e-liquids and lower-strength nicotine salts.
- *1.0 Ohm Coil (12-15W):* Cooler vape, tighter draw. Ideal for standard 50/50 freebase nicotine.
- *1.2 Ohm Mesh Coil (10-12W):* Very tight MTL draw, minimal vapour, maximum throat hit. Optimised for high-strength (20mg+) nicotine salts.
E-Liquids: Optimised for VG/PG ratios of 50/50, 60/40 (PG/VG), and 70/30 PG/VG (high-PG). Not recommended for 70/30 VG/PG or higher VG liquids.

Colours

Vape Blaze offers the Uwell Caliburn GK2 in an explosive range of colour variants. Each one brings a different personality to the steampunk theme. Here is your complete guide:

Limpid Green: Translucent, crystal-clear green that reveals the inner workings of the device. Like looking into a vintage apothecary bottle, this finish has depth and intrigue. The steampunk gears appear to float within the transparent shell. Perfect for the technically curious vaper.
Limpid Yellow: Bright, cheerful, and translucent like liquid sunshine. This finish radiates warmth and positive energy. The transparency allows light to pass through, illuminating the internal battery and circuitry. An instant mood-lifter in device form.
Limpid Pink: Soft, elegant, and playful. This translucent pink finish has a delicate, candy-like quality while maintaining sophisticated steampunk etching. Light dances through the shell, creating a warm glow. Ideal for vapers who want a device that is both cute and classy.
Ribbon Red: Deep, rich, and opulent. This opaque crimson finish has a subtle metallic sheen that catches the light. The steampunk gear pattern is rendered in contrasting bronze and gold, creating a regal, almost heraldic appearance. For vapers who want to make a bold statement.
Matte Black: The undisputed classic. Sleek, non-reflective, and endlessly versatile. The ghosted steampunk pattern in gunmetal grey is visible without being flashy. Resists fingerprints beautifully. For vapers who value understated, timeless style.
Aurora Green: Mesmerising and iridescent. This finish shifts colour as it moves – from deep forest green to vibrant emerald to hints of blue and purple. The steampunk gears overlay this dynamic surface, creating a supernatural appearance. Like holding a piece of the northern lights.
Ocean Flame: A stunning gradient from deep ocean blue to warm, fiery orange-red. This captures the essence of a tropical sunset over the sea. The steampunk etching adds mechanical precision to this organic colour flow. Arguably the most visually striking variant in the range.
Limpid Cyan: Cool, refreshing, and translucent. This crystal-clear cyan tint evokes images of tropical lagoons and clear summer skies. The internal components are visible, creating a fascinating layered aesthetic. Perfect for vapers who favour cool, clean, aquatic vibes.
Limpid Black: Smoky, dramatic, and mysterious. This translucent black allows you to see the inner battery and circuitry through a dark, tinted lens. The steampunk pattern is subtly visible. Stealthy, high-tech, and sophisticated. For the modern vaper with an edge.
Limpid Grey: Sophisticated and industrial-chic. This translucent grey sits perfectly between clear and smoky. The transparency reveals the inner workings while the grey tint adds a layer of mystery. Neutral, versatile, and endlessly appealing. A true all-rounder.

Package Contents

1 x Uwell Caliburn GK2 Device (690mAh built-in battery)
1 x Uwell Caliburn G2 Refillable Pod (2ml capacity)
1 x Uwell Caliburn G 0.8 Ohm Mesh Coil (pre-installed)
1 x Uwell Caliburn G 1.2 Ohm Mesh Coil (spare)
1 x USB-C Charging Cable (USB-A to USB-C)
1 x User Manual (British English)
1 x Vape Blaze Branded Warranty Card

How to Use

Unboxing: Remove all components from the packaging. Check the device and pod for any visible transit damage.
Coil Priming: Take the 0.8 Ohm coil. Apply 2-3 drops of your e-liquid directly into the centre of the coil and onto the side cotton wicking ports. This prevents dry burning on first use.
Pod Filling: Remove the black mouthpiece by pulling it upward. Lift the silicone rubber plug. Insert your e-liquid bottle tip and fill the pod with your chosen 50/50 or nicotine salt liquid. Do not exceed the 2ml maximum fill line. Close the plug firmly and replace the mouthpiece until it clicks.
Saturation Period: Let the filled pod sit for 5 minutes. This is absolutely crucial for the cotton to fully saturate with e-liquid.
Pod Installation: Insert the pod into the battery body. Magnets will pull it into the correct position. You will feel and hear a click.
Power On & Activation: The GK2 has no on/off button. It is always ready. Simply inhale from the mouthpiece to activate the draw sensor.
Adjusting Airflow: Locate the small knurled wheel on the underside of the pod. Rotate while taking test puffs:
- Rotate fully clockwise for maximum resistance (tight, cigarette-like MTL).
- Rotate fully anti-clockwise for minimal resistance (smooth, airy RDL).
Battery Monitoring: Check the LED light colour: Green = 60-100% battery. Blue = 30-60% battery. Red = Below 30% battery (charge soon).
Charging: Insert USB-C cable into the device and connect to a 5V/1A USB power source. Red light means charging. Light turns off when the 690mAh battery is fully charged (approximately 45-60 minutes).

FAQ’s

Q: How does the Caliburn GK2 differ from the original Caliburn Koko?
A: The GK2 is a significant evolution. It features a larger 690mAh battery (up from 520mAh), adjustable airflow (the original Koko had none), Pro-FOCS flavour technology, USB-C charging, and a completely redesigned pod with leak-resistant engineering. It is essentially the Koko you loved, but better in every way.
Q: Which coil gives a tighter draw – the 0.8 Ohm or the 1.2 Ohm?
A: The 1.2 Ohm coil provides a noticeably tighter, more restrictive mouth-to-lung draw. It also produces less vapour and uses less battery. The 0.8 Ohm coil is slightly looser and warmer. For the tightest possible draw, use the 1.2 Ohm coil and set the airflow wheel to its most closed position.
Q: Can I use my own drip tip with the GK2 pod?
A: No. The G2 pod features a proprietary integrated snap-fit mouthpiece. It is not a standard 510 drip tip connection. However, the mouthpiece is ergonomically designed for comfort and is easily removable for filling.
Q: Why does my device keep flashing red when I inhale?
A: A red flashing light typically indicates a low battery. Connect the device to a USB-C charger. If it continues to flash red after charging, the pod may not be making a proper connection. Remove and reinstall the pod, and ensure the coil is fully seated. If the problem persists, try a different coil.
Q: Is the Uwell Caliburn GK2 TPD compliant for the UK market?
A: Yes, absolutely. This specific version sold by Vape Blaze features a 2ml tank capacity, which is fully compliant with the UK Tobacco and Related Products Regulations (TPD). The packaging and manual are also UK-specific. You are buying a legal, fully compliant product.
Q: How often should I replace the G2 pod itself (not just the coil)?
A: While coils are replaced every 1-2 weeks, the pod itself should be replaced approximately every 4-6 weeks or when you notice the snap-fit mouthpiece becomes loose, the silicone fill plug swells, or the plastic becomes cloudy from strong e-liquids (like menthol, cinnamon, or banana flavours).
Q: Can I chain vape with the GK2?
A: Yes, to a reasonable degree. The 0.8 Ohm coil handles moderate chain vaping well due to its efficient mesh design and wicking. However, taking 5-6 extremely long puffs back-to-back may lead to the wick drying out slightly. Allowing 10-15 seconds between puffs ensures optimal saturation and maximum coil life.