Caliburn A3S Vape Kit Midnight Black

Overview

The Caliburn A3S Vape Kit Midnight Black by Uwell in Midnight Black at 0mg. Free UK delivery over £20, same-day dispatch on weekday orders before 4pm.

Uwell Caliburn A3S Vape Kit at a Glance

The Uwell Caliburn A3S Vape Kit is a refillable pod kit priced at £14.99, and it comes from one of the better-known names in the small-device end of the market. It arrives as hardware only. There is no e-liquid in the box, which is why the listing shows 0mg: that figure describes the empty kit, not a nicotine-free product. You choose the liquid, and therefore the strength, yourself.

Uwell built its reputation on the Caliburn name, and the A3S carries that lineage forward in a slim, pocketable body that is easy to pick up and use without studying a manual first. It is sold in six colourways, Iris Purple, Lake Green, Midnight Black, Moonlight Silver, Ocean Flame and Space Grey, all at the same price. If you want the full run of the maker's devices, our Uwell collection lists everything we stock under the brand, from kits to spares.

Where does it fit? Within our wider pod kits range, the A3S is the sort of device people buy once they have worked through a few disposables and started to notice what they are really paying for. A refillable kit swaps the throwaway body for a rechargeable battery and a pod you top up from a bottle. The upfront cost is a little higher than a single disposable, but the running cost afterwards is the price of a bottle of liquid and the occasional fresh pod.

You will not find a puff count on this page, and that is deliberate. A disposable is sold by the puff because it holds a fixed amount of liquid. A refillable kit lasts as long as you keep refilling it, so the real figure depends on your liquid, your habits and how often you replace the pod. The sections below explain how the kit works, what to put in it, how to look after it and what to do when something misbehaves, so you can decide before you buy. Everything here is intended for adults aged 18 or over.

Who the A3S Suits and Who Should Look Elsewhere

Picture the typical buyer. They have been through a run of disposable vapes, they are fed up with binning a perfectly good battery every week or two, and they would like a device they can keep. That is the person the Caliburn A3S is built for. It asks for slightly more involvement than a disposable, a bottle to buy and a pod to fill, and in return it gives you control over flavour, strength and cost.

It also suits adults who are moving away from cigarettes and want something small enough to live in a jacket pocket or a bag without a second thought. Plenty of people in that position like a draw-activated pod device because the action feels close to a normal inhale, with no buttons or settings to learn. That is a description of why the format is popular, not a promise about any outcome.

A less obvious fit is the backup device. Some people keep an A3S at work or in the car, filled with a liquid they enjoy, and a larger setup at home. At this price, a spare that is always charged and ready is not a big commitment.

Be honest about the trade-offs, too. If you want zero upkeep, a disposable vape is still the simplest option: use it, then bin it. If you like to tinker with wattage, coil builds and airflow rings, a compact pod kit will feel restrictive, and you would be better served by the larger systems in our vape kits range. And if you have never used nicotine, this is not a product that needs to enter your life at all.

One rule applies to every device on the site. You must be 18 or over to buy, and we check age at checkout and again on delivery.

How the A3S Works, From Battery to Pod

Only two parts of this kit really matter: the battery body and the pod. The body holds a rechargeable battery and the circuitry that decides when to deliver power. The pod clicks onto the top, holds the liquid in a small reservoir and contains the coil, the heating element wrapped in absorbent cotton that turns liquid into vapour.

Uwell's A-series Caliburns are draw activated. A sensor in the body notices the change in air pressure when you inhale through the mouthpiece and switches the coil on for as long as you keep drawing. Stop, and it stops. There is no button to hold, which is why this style of device feels natural to people coming from disposables, nearly all of which behave the same way. If the leaflet in your box describes something different for your unit, follow the leaflet rather than this page.

The liquid travels from the reservoir to the cotton by capillary action, much as a wick draws up candle wax. That is why patience matters after filling. Cotton that has not yet soaked up liquid can overheat, and the result is a harsh, burnt taste that puts people off a perfectly good pod. A freshly filled pod needs a few minutes to settle before the first proper draw.

Because the coil lives inside the pod, you do not rebuild or swap it separately. When the flavour fades or the vapour thins, you replace the whole pod. Pods of this kind are listed in our refillable vape pods range, and the sensible habit is to match the pod to the exact device name on the pack before you order.

UK rules limit pod and tank capacity to 2ml, so no compliant device will hold more than that. It also explains why refilling becomes a normal part of the routine rather than an occasional chore. Small reservoir, quick top-ups, no drama.

Six Colourways, One Price

Iris Purple, Lake Green, Midnight Black, Moonlight Silver, Ocean Flame and Space Grey. Those are the six finishes, and every one costs £14.99.

Colour makes no difference to how the kit performs. The electronics, the pod and the battery are the same underneath, so choose purely on what you will enjoy picking up every day. A few practical thoughts may help. Darker finishes such as Midnight Black and Space Grey tend to hide pocket lint and everyday scuffs but pick up fingerprints; lighter ones such as Moonlight Silver show the reverse. Brighter shades like Iris Purple, Lake Green and Ocean Flame are easier to spot at the bottom of a bag, which is a genuine advantage if you tend to lose small devices.

Select your shade on the product page before adding to basket. Photos are only a guide, and the same colour can look different on a phone and on a laptop, so treat the shade name as the description and the picture as an approximation. Stock of individual colours can move from week to week, so if your first choice is unavailable, it is worth checking back or picking a close alternative rather than waiting indefinitely.

Some buyers order two in different colours, one for the bag and one for the desk, so a flat battery never leaves them stranded. At £14.99 each that is a cheaper insurance policy than it first sounds, though you will want to keep track of which flavour sits in which device if you run more than one liquid.

Whatever you choose, remember that the kit ships without liquid. The colour is the fun decision. The liquid is the one that decides whether you enjoy it.

Where the A3S Sits in the Caliburn Family

Uwell sells a lot of Caliburn variations, and the names can blur together. A quick map helps before you spend anything.

At the budget end, the Caliburn G5 Lite starts at £8.99 in Candy Pink, with the G5 Lite SE at £9.99, and the Caliburn AK3 pod system is listed at £7.99. Slightly above those, the Aeglos P1 pod kit is £11.99. The A3S at £14.99 sits in the middle of that ladder. Prices move, so treat these as a snapshot of the shelf at the time of writing rather than a promise.

Above it, the Uwell Caliburn G3 Pod Vape Kit is £16.99 in the Black colourway, with the G4 Classic and G4 Pro kits higher still. The practical difference for a buyer is the pod. The G3, G4 and G5 devices share the GPP pod system, sold in 0.4, 0.6, 0.9 and 1.2 Ohm versions, which lets you tune the draw from tight and cigarette-like to warm and airy. That is a real feature if you enjoy experimenting.

The A3S is its own device with its own pods. Do not buy GPP pods hoping they will fit; they are named for the G3, G4 and G5 and are not listed for the A3S. The safest habit is to read the device name on any pod pack and make sure it matches the kit in your hand.

So how do you choose? If you want a menu of resistances and enjoy fine-tuning, the G-series is the natural home. If you want the cheapest possible way in, the G5 Lite or the AK3 will do the job. If you would rather have a mid-priced, straightforward Caliburn with a choice of six colours and no resistance decisions to make, the A3S is the sensible middle path. Everything is easier to compare side by side on the brand page, and the differences are worth five minutes of reading before you commit.

Choosing E-Liquid That Suits a Pod Device

Thickness comes first when you pick liquid for a pod. E-liquid is a blend of vegetable glycerine (VG) and propylene glycol (PG), and the ratio decides how quickly it moves through the cotton. Small pod coils like thinner liquid. A 50/50 blend flows readily and gives a sharper flavour, while very thick, high-VG liquid built for large sub-ohm tanks can struggle to wick in a compact pod, which risks dry or burnt hits.

That is why nicotine salts are such a common match for kits like this. Most nicotine salt e-liquids come in balanced or thinner blends and are made for low-powered pod devices, so they tend to work the way you would expect from the first fill. They are sold in 10ml bottles, which is the maximum size UK rules allow for liquid containing nicotine.

What about short-fill e-liquids? These are sold as nicotine-free liquid in larger bottles, with space left for nicotine shots if you want to add them. They are good value for the volume, but many are high VG and aimed at big tanks, so read the VG/PG ratio on the label first. If it is 70/30 or thicker, a pod like this may not be the ideal home for it.

Flavour choice is personal, but a few patterns hold. Fruit and menthol liquids tend to be clean and long-lasting in a pod. Creamy, dessert-style liquids carry more sweeteners, which can leave residue on a small coil and shorten pod life. If you are trying a new flavour, buy one bottle before committing to several, and write down what you thought. Over a month or two you will learn what keeps your pods tasting fresh longest.

Finally, keep the liquid and the device as a pair. If you change flavour, let the old one run low first, because mixing leftovers in a pod muddies both.

A Nicotine Strength Guide for First-Time Refillers

Nicotine strength is the one decision the listing leaves entirely to you. The 0mg on the product page simply reflects that no liquid is supplied. Strength comes from the bottle you buy, measured in milligrams per millilitre, and the legal ceiling in the UK for nicotine e-liquid is 20mg/ml.

This is a general guide, not personal advice, and it assumes you are an adult who already uses nicotine. Nicotine is addictive, so anyone who does not currently use it has no reason to start.

• 0mg. No nicotine at all. Some adults use this for flavour alone, or to step down gradually. Our nicotine-free e-liquids cover it.
• 10mg. A moderate salt strength. People who smoked lightly, or who find 20mg too punchy, often settle here.
• 20mg. The top of the legal range. Adults coming from a heavier smoking pattern commonly start at this level in a pod device, because salts deliver smoothly even at higher strengths.

Why do pod users often choose higher strengths than people with big tanks? Because a pod produces smaller clouds from less power, so each draw delivers less nicotine overall than a large device would. If you find yourself taking constant short draws and still feeling unsatisfied, that is a sign the strength may be too low. If you feel dizzy, queasy or jittery, it is too high, so stop and drop a step.

Whatever you choose, try to stay consistent for a couple of weeks before judging. Switching strength and flavour at the same time makes it impossible to know which change caused which effect. And store nicotine liquid securely, out of reach of children and pets, in its original labelled bottle.

Filling and First Use, Step by Step

Filling a pod is easier than it sounds, and the first time is the one that sets your habits. Here is a sequence that works for pods of this style.

• Prepare. Wash and dry your hands and work over a flat surface. A tissue underneath catches the odd drip.
• Remove the pod. Pull it gently from the body. Look for the small fill opening on the pod, often covered by a silicone bung that lifts out or folds back.
• Fill slowly. Tilt the pod and let the liquid run down the inside wall so you avoid flooding the central air tube. Stop at the fill line, or just below it if there is no mark. Never fill to the brim.
• Seal and refit. Press the bung fully home and push the pod onto the body until it seats firmly.
• Wait. Leave it five to ten minutes so the cotton can saturate. This is the step people skip, and the one that costs them a pod.
• Prime. Take two or three gentle, short draws before settling into normal use.

Check the battery before the first session. If a kit has been in transit or storage, it may arrive with little charge, so a short top-up is sensible. The leaflet in the box will tell you if Uwell has specific first-use advice for your unit.

On the first day, take it easy. Brand-new cotton is still bedding in, and long, hard pulls can overheat it before it has fully soaked. Slow, steady draws of two or three seconds suit this kind of device. After a few refills you will know by feel when the pod is running low, and you will find the routine takes less than a minute.

If you want to change flavour, let the pod run close to empty before refilling with something different. A pod is a consumable, not a tank, and it is not designed to be flushed out and reused indefinitely.

Battery, Charging and Storage Habits That Help

Battery capacity is printed on the packaging, so check the box rather than trusting any retailer's summary, ours included. What matters in daily use is how you treat the battery, because habits make a bigger difference than the headline figure.

Charge it with a sensible cable and a reputable plug. A phone-style wall adaptor or a computer port is fine; cheap unbranded chargers of unknown output are not worth the saving. Plug in when the device is running low rather than letting it go completely flat every time, and unplug when it is full instead of leaving it connected for days. Neither habit is dramatic on its own, but over a year they add up to a battery that holds its charge better.

Do not charge the kit on a bed, a sofa or anywhere that traps heat, and do not leave it unattended while it charges. If the body becomes unusually hot, stop using it, unplug it and contact us. Swollen casings, odd smells and damaged ports are all reasons to retire a device, not keep nursing it.

Storage is about keeping liquid where it belongs. Store the kit upright when you can, with the mouthpiece pointing up, so liquid stays in the reservoir and away from the air path. Avoid hot cars and windowsills, because heat thins the liquid and expands the air inside the pod, which pushes liquid out. Cold is less harmful but slows wicking, so let a chilled device warm to room temperature before use.

Travelling by air deserves a note. Cabin pressure changes can force liquid out of a full pod. The simplest fix is to travel with the pod nearly empty, or to carry the kit and liquid in a zip bag, and refill after you land. In a pocket or bag day to day, a snug case or pouch keeps lint out of the mouthpiece and the charge port, and keeps the device out of the same space as keys and coins.

Honest Pros and Cons

No device suits everyone, so here is a plain-speaking summary of what the A3S does well and where it asks something of you.

What works in its favour

• It is refillable and rechargeable, so you are not throwing away a battery every few days.
• Choice of liquid is entirely yours, from flavour to strength, which is the biggest practical advantage over a sealed disposable.
• The running cost is a bottle of e-liquid and an occasional pod, which usually works out cheaper than a steady diet of disposables.
• Draw activation means no buttons, no menus and nothing to learn.
• The body is compact and pocketable, and six colourways at the same price let you pick a favourite.
• It comes from a long-established brand with a deep Caliburn range, so related kits and pods are easy to find.

Where it asks more of you

• It ships with no liquid, so you must buy a bottle before you can use it.
• The reservoir is small, as UK law demands, so expect to refill often if you vape through the day.
• Pods are consumables with the coil built in. They wear out, and the replacement cost is part of ownership.
• There are no adjustable settings. That is a benefit for simplicity and a limit for tinkerers.
• Pods are specific to the device, so you cannot assume pods from other Caliburn lines will fit.
• Careless filling leads to leaks and mess, which the step-by-step routine above largely prevents.

Weigh those two lists against your own routine. If the right-hand column sounds like an acceptable chore, the kit is a sensible buy. If it sounds like a headache, a sealed disposable may still serve you better.

Troubleshooting Leaks, Dry Hits and Silent Pods

Most problems with pod kits come down to a short list of causes, and nearly all are fixable at home. Work through the symptom, not the panic.

• Gurgling or spitting. Usually excess liquid in the air path. Wipe the mouthpiece, tilt the device with the mouthpiece down, and give a gentle puff of air into a tissue. Overfilling is the usual culprit.
• Leaking from the base. Check the pod is seated fully and the fill bung is pushed all the way in. A pod that has been overfilled or left in a hot place will leak even if it is perfectly good.
• Burnt or harsh taste. Either the pod has not had time to saturate, or the coil is spent. Wait a few minutes, take gentle draws and, if the taste persists, replace the pod. Do not keep going on a pod that tastes burnt.
• Weak vapour with a fully charged battery. Often a clogged coil from sugary liquid, or a pod running dry. Refill, wait, and see. If it does not recover, it is time for a new pod.
• Nothing happens when you draw. Check the battery first. Then make sure the pod is firmly seated and the contacts are clean and dry. Remove the pod, refit it and try again.

You may see coils mentioned in our vape coils range, and it is worth being clear about how that fits. Coils are for kits that take separate replaceable heads. A pod-based kit like this replaces the whole pod instead, so you will not be buying loose coils for it.

How long should a pod last? There is no honest single figure. A light user on a clean fruit liquid might get a good stretch from one pod, while a heavy user on a creamy dessert flavour may need to swap sooner. The sign is flavour: when the taste goes flat or muddy even with fresh liquid, change the pod.

If the device itself seems faulty, or you have a question this page does not answer, our FAQs and contact page are the quickest route, and faulty items can be returned under the terms in the next section.

Delivery, Returns and Buying With Confidence

Ordering is straightforward. The A3S is £14.99, which is below our free-delivery threshold, so a single kit will carry a standard delivery charge unless your basket reaches £20. Adding a bottle of e-liquid to the same order usually does exactly that, and it means you have something to put in the pod when the parcel arrives.

Our delivery and returns page sets out the current terms in full. In summary, standard UK delivery is free on orders over £20 and arrives in two to three working days. Under £20 it costs £2.99. Next-day delivery is £4.99, and orders placed before 4pm on a working day are dispatched the same day.

On returns, the rules for this category are strict for hygiene and safety reasons. We cannot accept returns on opened e-liquids, disposables or pods. Faulty items can be returned within 30 days for a replacement or refund, so if the kit arrives damaged or does not work as it should, get in touch promptly and we will sort it out.

Age checks are part of every order. Everything we sell is strictly for adults aged 18 or over, and orders are verified at checkout and again on delivery. You can read how that works on our age verification page, and it is worth having valid ID to hand when the courier calls.

Finally, a note on authenticity. We source from brands and authorised UK distributors, so what arrives is genuine stock. If you spot a better price on the same kit elsewhere, make sure the seller is a legitimate UK retailer, check the pack for the proper UK labelling and think twice about anything that looks suspiciously cheap.

Take your time over the choice of colour and liquid, and buy only what you will use. A good first fill with a flavour you like is worth more than a drawer full of untried bottles.