Description
TL;DR: The Uwell Caliburn A3 is the simplest refillable pod kit Uwell makes: a slim 520mAh MTL device with a 2ml top-fill pod and a built-in 1.0 ohm coil, at £13.99. Best for ex-smokers who want a tight, cigarette-like draw with zero settings. Not ideal for heavy all-day vapers or anyone chasing clouds.
Key Facts
The Uwell Caliburn A3 has a 520mAh built-in battery and charges over USB-C.
The Caliburn A3 outputs up to 13W, set automatically for a smooth MTL draw.
The kit uses a 2ml top-fill pod with a built-in 1.0 ohm FeCrAl mesh coil.
The Caliburn A3 fires by button or by inhaling, with an LED battery light.
The Caliburn A3 measures 109.8 x 21.3 x 11.7mm, one of the slimmest pod kits made.
The Uwell Caliburn A3 costs £13.99 at Vape Online Store as of August 2026.
The Uwell Caliburn A3 Pod Kit strips vaping back to the essentials. A pod kit is a small refillable vape you fill from a bottle of e-liquid, and the A3 keeps it foolproof: no wattage to set, one pod type, and a tight mouth-to-lung draw that feels close to a cigarette. It is the device we hand nervous switchers who found everything else fiddly. Compared with the coil-swapping Caliburn G, the A3 is cheaper and simpler but uses whole pods rather than replaceable coils.
Key Specs Customers Check
Battery: 520mAh built-in. A full day for light vapers, around half a day for moderate use; tops up fast over USB-C.
Output: up to 13W, automatic. No settings to learn; the device matches the power to the pod.
Pod: 2ml top-fill (UK TPD). Lift the mouthpiece and fill; the coil is built into the pod.
Coil: 1.0 ohm FeCrAl mesh. Tuned for a tight MTL draw and smooth nic salt flavour.
Activation: button or draw. Press to fire or simply inhale, whichever you prefer.
Charging: USB-C. Modern and efficient; the cable is sold separately.
Safety: overtime and short-circuit protection. Sensible guards for a first device.
Size: 109.8 x 21.3 x 11.7mm. Slim and light enough to forget in a pocket.
Pick Your Inhale: MTL by design
MTL (mouth-to-lung) is a tight, cigarette-like draw, and the Caliburn A3 is built purely for it. You draw the vapour into your mouth first, then breathe it in, exactly like a cigarette. There is no airflow slider or high-power coil, which is the point: it does one thing and does it well. If you want big clouds or a loose direct-lung pull, choose a sub-ohm kit instead.
Pods and E-Liquid Pairing
The 1.0 ohm pod wants thin liquid. Use 50/50 e-liquid or nic salts; nic salts deliver nicotine smoothly at higher strengths, which is why they suit ex-smokers and anyone replacing disposables. A 20mg nic salt gets closest to a disposable’s hit, while lighter vapers can run 10mg. Browse 10ml nic salts for flavours. Avoid thick 70VG shortfills; they wick too slowly in this pod and cause dry, burnt hits.
Battery, Pod Life and Running Cost
The 520mAh cell is small, so heavy vapers will charge once during the day; light vapers get a full day. Because the coil is inside the pod, you replace the whole pod when flavour fades, roughly every one to two weeks. Affordable Caliburn A3 replacement pods plus a couple of 10ml bottles keep the weekly running cost around £4 to £5, a fraction of a disposable habit.
Compatibility and Refills
The A3 takes Caliburn A3 replacement pods only, with the 1.0 ohm coil built in. The trap to avoid: Caliburn A2, AK2 and G pods do not fit the A3, so check the packet says A3 before buying spares. Explore the wider Uwell Caliburn range if you later want replaceable coils or a bigger battery.
Best Colours
The Caliburn A3 comes in six finishes. Black is the discreet, most-searched pick and suits pocket or work carry. Grey and Silver keep that low-key look with a little more character, while Blue, Green and Red are the standout choices for vapers who want their kit easy to spot in a bag.
How to Set Up the Uwell Caliburn A3
Pull the pod out and lift the top-fill mouthpiece.
Fill with 50/50 e-liquid or nic salts, then press the mouthpiece back down.
Wait 5 to 10 minutes so the coil primes, meaning the cotton soaks fully before the first puff.
Click the pod into the device.
Inhale to vape, or press the button to fire; there are no settings to adjust.
How to Make It Last Longer
Never vape a dry pod. Refill before the liquid drops below the coil inlets.
Prime every new pod with the 5 to 10 minute soak to avoid an early burnt taste.
Stick to 50/50 or nic salt liquid. Thick shortfills clog the small coil.
Leave a few seconds between puffs so the wick re-saturates.
Top up the battery through the day rather than draining it flat every time.
Uwell Caliburn A3 Price Comparison
As of August 2026, UK stores generally list the Caliburn A3 between £14 and £17. Vape Online Store sells it at £13.99, at the bottom of that range, which makes it one of the cheapest genuinely good refillable starter kits in the UK. For a little more, the coil-swapping Caliburn G at £15.99 lowers long-term running costs, but for pure simplicity the A3 is the value pick.
What’s in the Box
1 x Caliburn A3 device (520mAh)
2 x Caliburn A3 1.0 ohm pods (2ml)
1 x user manual
USB-C cable sold separately
Uwell Caliburn A3 FAQs
Is the Uwell Caliburn A3 good for beginners?
Yes. It is one of the simplest kits available: draw or button firing, no wattage settings, and a tight MTL draw that feels like a cigarette. Fill it and vape.
Which pods fit the Caliburn A3?
Only Caliburn A3 pods, which have the 1.0 ohm coil built in. Caliburn A2, AK2 and G pods do not fit.
What e-liquid should I use in the Caliburn A3?
50/50 e-liquid or nic salts at 10 to 20mg. A 20mg nic salt is closest to a disposable; avoid thick 70VG shortfills.
Is the Caliburn A3 MTL or DTL?
MTL only. It is built for a tight, cigarette-style draw and is not a cloud or direct-lung device.
How long does the Caliburn A3 battery last?
The 520mAh cell lasts a light vaper a full day and a moderate vaper about half a day, with a quick USB-C recharge.
How long does a Caliburn A3 pod last?
One to two weeks for most vapers. When the flavour dulls or turns slightly burnt, swap the whole pod; the coil is built in.
Does the Caliburn A3 come with a charging cable?
No. It charges over USB-C but the cable is sold separately, so use any standard USB-C lead you already own.
