Uwell Caliburn X Empty Pods

Overview

The Uwell Caliburn X Empty Pods by Uwell at 0mg. Free UK delivery over £20, same-day dispatch on weekday orders before 4pm.

Uwell Caliburn X Empty Pods: what they are and what you are buying

The Uwell Caliburn X Empty Pods are refillable replacement pods made for the Uwell Caliburn X pod system. They arrive empty, which is exactly what the name says: there is no e-liquid inside, so you choose the flavour, the nicotine strength and the brand of liquid yourself. That puts you in control of both the taste and the running cost, and it is the main reason adult vapers move from single-use devices to a refillable pod kit in the first place.

A pod in this style is a small plastic cartridge that combines three things in one unit: the e-liquid reservoir, the mouthpiece you draw from, and the heating coil. When the pod seats into the battery section of the device, the coil connects to the power contacts. You inhale, the device delivers power, and the coil heats the liquid that has soaked into its wicking material. Because the coil lives inside the pod rather than in the device, replacing the pod also replaces the coil. There is nothing to screw in, no cotton to wick by hand and no separate coil head to prime.

Uwell is one of the longest-running names in pod hardware, and the Caliburn family is the line most people associate with the brand. Over several generations the range has been built around compact, pocketable kits that are easy for a first-time buyer to understand. The Caliburn X Empty Pods follow that approach. They are a consumable part, sold at a low price, and designed to be swapped every so often rather than treated as a permanent fixture of the device.

This page is written for UK adults aged 18 or over. The pods are a vaping accessory, and nothing here is health advice or a claim that vaping is safe or helps anybody stop smoking. What follows is a practical guide to what the pods are, how to choose liquid for them, how to look after them, and whether they are worth buying.

• Product type: refillable replacement pods, supplied empty
• Brand: Uwell
• Made for: the Uwell Caliburn X pod system
• Nicotine: none in the box, strength depends on the liquid you add
• Intended buyer: adults who already use, or are about to use, a Caliburn X kit

You will notice that this page does not quote a coil resistance, a wattage range or a battery figure as if it were a fixed fact. Exact numbers like those are printed on the packaging of the batch you receive, and manufacturers do revise components between production runs. Check the pack when it arrives rather than relying on a generic number from a web page, including this one.

Compatibility: making sure the pods match your device

Compatibility is the most important thing to check before you buy any replacement pod, and it is where most disappointment starts. Uwell has released a lot of Caliburn devices over the years, and although the names look alike, the pods are not all interchangeable. A pod made for one model can look almost identical to the pod from another and still fail to seat, fail to fire or leak, because the base, the contacts or the airflow alignment differ in small ways.

These pods are sold as Caliburn X Empty Pods, which means they are intended for the Uwell Caliburn X. If you own that device, you are in the right place. If you own a different Caliburn, such as an older G-series kit or one of the A-series devices, do not assume these will fit just because the brand and family name match. Look instead for the pod listing that carries your own model name.

• Check the device: the model name is normally printed on the base of the battery section or on the original box
• Check the old pod: if you already have a Caliburn X pod, compare the base and the shape of the mouthpiece with the new one
• Check the packaging: replacement pod packs name the devices they are made for
• Do not force it: a pod that does not seat with light, even pressure is either the wrong pod or is the wrong way round

It is also worth being wary of pods sold on open marketplaces at prices that look too low to be real. Counterfeit and unbranded pods exist for popular device families, and they tend to have loose seals, poorly fitted coils and fill plugs that do not hold. Buying from a UK retailer that sources genuine stock avoids that problem, and it means you have somebody to contact if a pod arrives faulty.

One more practical point. The kit your device came in probably included at least one pod, and that pod may already be partly used. Pods are consumable items, so the pack in your hand today is most likely a supply of spares for when the first pod wears out, not a one-time purchase that lasts the life of the device. Many regular vapers keep two or three spare pods in a drawer so a worn coil never leaves them without a working device on a Monday morning.

Performance and vapour delivery

Pod systems sold in the UK all work inside the same set of rules: refillable pods are limited to 2ml of liquid, liquid bottles to 10ml, and nicotine strength to 20mg/ml. Within those limits, the performance of any pod comes down to three variables: the coil inside it, the liquid you put in it, and the power the device sends to it. The pod is the part that turns that power into vapour, so it matters more than its small size suggests.

Most compact pod kits in this class fire automatically when you inhale, so there is no button to press. You draw, the sensor detects airflow, and the coil heats. The draw on this type of pod is typically a gentle, mouth-to-lung pull, similar in feel to a cigarette and noticeably tighter than the open airflow of a sub-ohm tank. If you are coming from disposables you will find the draw familiar. If you are coming from a big tank you will find it restrained, and that is by design: pod devices are built for discretion, flavour and nicotine satisfaction rather than cloud size.

Fresh pods tend to perform consistently for the first stretch of their life. Flavour is clean, vapour is steady and the throat hit is predictable. Over time the coil gradually builds up residue from the sweeteners and colourings in your liquid. Flavour then softens, the vapour gets slightly warmer and a faint caramelised note may appear. That is the normal wear pattern for any pod, not a fault, and it is the signal to fit a fresh one.

• First few fills: the cleanest flavour and the most even vapour
• Middle of the pod's life: stable performance with a small drop in flavour sharpness
• End of life: muted flavour, warmer vapour, occasional dry or burnt notes

How long a pod lasts depends on how often you vape, how sweet your liquid is, and how thick it is. Heavy dessert and sweet fruit liquids age a coil faster than light fruits or menthol. A vaper taking a few dozen draws a day might get a couple of weeks from a pod, while someone chain-vaping all day may want to replace it sooner. Treat any figure you read online as a guide only, because the real answer is whenever flavour and vapour start to fade for you.

Coils, wicking and what is happening inside the pod

The coil is the working heart of any pod. It is a small heating element wrapped around or built into a wicking material, usually cotton or a similar fibre. Liquid travels from the reservoir into the wick through small channels, the coil heats, and the liquid turns to vapour. Everything about how a pod tastes and feels comes from how that coil is built and how well the wick keeps up with the heat.

Pod coils generally fall into a few families. Round-wire coils are the traditional design and heat quickly. Mesh coils spread the heating surface across a flat or cylindrical sheet, which tends to give broader flavour and more even heating. Ceramic coils use a porous ceramic block as the wick and are valued for clean, consistent flavour and for lasting a long time. Uwell has used more than one coil style across the Caliburn range over the years, so we are not going to claim a specific construction for this pod unless it is printed on the pack. Check the packaging for the coil type and its resistance in ohms.

Resistance is worth understanding because it changes how the pod behaves. As a general rule across the category:

• Higher resistance, around 1.0 ohm and above: tighter draw, cooler vapour, lower power use and longer battery life, which suits nicotine salt liquids at higher strengths
• Lower resistance, below about 0.8 ohm: a looser draw, warmer and bigger vapour, and faster use of both liquid and battery, which suits lower nicotine strengths

Liquid thickness matters just as much as coil design. The wick has to pull liquid in fast enough to match the heat, and thick liquids move slowly. Most nicotine salt liquids sold for pods are made with a balanced or PG-heavy base, and these wick easily. Very high VG liquids, particularly those at 70 per cent VG or above, can starve a small pod wick and cause dry hits. If your pod gives a burnt taste on a fresh fill, check the VG ratio on the bottle before you blame the coil.

Finally, remember that a pod coil is a sealed, disposable part. Do not try to clean it with water or wipe it dry. Letting a pod rest between sessions and keeping it upright is more effective than any cleaning attempt, and when the flavour fades, replacing the pod is cheaper than the time you would spend trying to rescue it.

Flavour profile: the taste comes from your liquid, not the pod

Empty pods have no flavour of their own, so the flavour profile is entirely your choice. What the pod does is deliver whatever you put in it with as little distortion as possible. That makes the choice of liquid the part of the decision that deserves most of your attention, so it is worth thinking about what actually suits a small, restricted-draw pod.

Nicotine salt liquids are the natural partner for pod kits. They are formulated to be smooth at higher nicotine strengths and to work with the lower power output of a compact device. Within that group, flavours fall into a handful of families, each of which behaves a little differently inside a pod:

• Fruit and berry: bright and easy, with strong flavour clarity. Sweet fruit liquids tend to leave more residue on the coil, so pods may need replacing a little sooner.
• Ice and menthol: cooling liquids that stay crisp from first draw to last. They are popular with vapers moving from menthol cigarettes, and they tend to age a coil more slowly than sugary blends.
• Tobacco: classic and nutty blends that work well at moderate wattage. These are the usual choice for adults who want something close to a roll-up or a cigarette.
• Dessert and bakery: custards, creams and sweet blends that look indulgent but are the hardest on a coil. If you vape these, plan to change the pod more often.
• Soda and sweets: light and playful, with moderate coil wear.

A pod will hold on to a little of the last flavour you used, a faint effect that vapers call ghosting. If you like to rotate between very different flavours, such as a mint one day and a berry the next, keep a pod for each family. A tobacco pod used once for a strong menthol will taste faintly minty for some time, and a pod used for a dessert liquid will never taste entirely clean again.

Because the pods are empty, there is no single flavour variant to list here. Think of the pods as a blank canvas and shop the liquid separately. Our range of nicotine salts and pod-friendly liquids covers all the families above, so pairing a fresh pod with a bottle you already know is the safest way to start.

Design and build quality

A pod has to do several jobs inside a very small body. It needs to hold liquid without leaking, pass vapour cleanly to your mouth, connect to the battery contacts reliably and survive being dropped into a coat pocket or a bag. The Caliburn pods have a reputation for tidy, practical construction, and that matches what you should expect to see when you open the pack.

The main body is normally a translucent or clear plastic so you can see the liquid level at a glance. This is more useful than it sounds, because running a pod too low is the usual cause of dry hits. A clear window lets you refill before the wick dries out. The mouthpiece is moulded into the same unit and is shaped for a comfortable, slightly flattened lip fit that most adult vapers find easy to hold between draws.

On the underside of the pod you will find the contact area and the airflow inlet, and on the top or side a small fill port sealed by a soft silicone plug. That plug is the part that keeps the liquid in, so it is worth checking when the pack arrives. It should sit flush with no gaps, and it should resist a gentle push without popping out.

• Look at the plastic: no cracks, no cloudy patches, no short mouldings
• Check the fill plug: seated evenly, not loose, not pinched at one edge
• Inspect the base: contacts clean and untouched, no stray glue or fluff
• Check the coil area: you should not see loose cotton or wire poking out of the wick holes

Build quality in this category is about consistency rather than luxury. A pod that seals correctly, fits the device snugly and holds liquid for a couple of weeks has done its job. Genuine Uwell pods have a good track record for that kind of consistency, which is one reason we recommend buying from a source that sells authentic stock. If a pod arrives with obvious damage, do not fill it. Contact the shop with your order number and a photo so the fault can be put right.

Handle the pod by its body rather than the mouthpiece, and avoid touching the contacts with oily fingers. Small details like that keep the connection clean and give you more reliable firing across the life of the pod.

Battery and charging: how the device powers each pod

The pods themselves contain no battery. They draw power from the battery section of the Caliburn X, which is a rechargeable lithium cell built into the device. We are not going to quote a milliamp-hour figure for the Caliburn X here because the right number is the one printed on your own device and in its manual, and we would rather you rely on that than on a generic claim. What matters for pod buyers is understanding how the pod and the battery work together.

Battery drain depends largely on the pod. A lower resistance coil asks for more power per draw, so the battery empties sooner. A higher resistance coil sips power and lasts longer between charges. If you notice that the battery seems to run down faster after fitting a new pod, check the resistance on the pack against your previous pod. A different resistance will explain the change.

• Charge with a decent adaptor: use a recognised brand charger and the cable that came with the device, or a good quality replacement
• Check the port type: most current pod kits charge over USB-C, but confirm on your own device
• Do not leave it charging unattended for long periods: lithium batteries are safe in normal use, but they should not be left on charge for days or overnight without supervision
• Keep it cool: never charge on a radiator, in direct sun or in a hot car
• Replace damaged cables: a frayed cable or a bent port is a reason to stop and replace, not to improvise

Vaping while a device is charging is something many pod kits can do, but it is better avoided. Heat from charging and from firing at the same time puts the battery under extra load, and giving the device a proper charge before you use it again is kinder to the cell.

Swapping pods does not affect the battery state, so you can replace a pod at any time without recharging first. Likewise, a flat battery does not damage a pod, though a pod left sitting in a flat device for weeks may let liquid migrate towards the contacts. If you are going to leave a device unused for a long time, remove the pod, empty it if you can, and store both parts in a cool, dry place.

Nicotine strength: choosing the right liquid for these pods

Because the pods are empty, nicotine strength is set by the liquid you choose, and the listing shows 0mg only because the pod itself holds no nicotine. In the UK, nicotine e-liquid is capped at 20mg/ml, and that limit applies to the liquid sold in bottles as well as to the liquid sealed inside single-use devices. Anything you buy from a UK retailer will sit at or below that ceiling.

Nicotine is addictive. This guidance is for adults who already use nicotine, and non-smokers should not start. If you do not want nicotine at all, 0mg liquid is available and works in the same pods.

Choosing a strength is about matching the nicotine level to your habit and to the pod. A restricted-draw pod with a higher resistance coil is naturally suited to nicotine salts, which feel smooth even at higher strengths. As a general guide for adult smokers moving to a pod kit:

• 18mg/ml to 20mg/ml salt: a common starting point for people used to smoking around a pack of cigarettes a day or more
• 10mg/ml to 12mg/ml salt: a typical choice for lighter or social smokers, or for people whose draw per session is long
• 3mg/ml to 6mg/ml freebase: traditional liquid for larger devices. It is usually a poor match for compact pods, because you would need many more draws to reach the same level.
• 0mg/ml: nicotine-free, for people who enjoy the flavour and hand habit without nicotine

Higher strength is not automatically better. Too much nicotine can give you a harsh throat hit, dizziness, nausea or a headache. If that happens, put the device down, drink some water and drop to a lower strength next time. A lower resistance coil delivers more vapour per draw, which delivers more nicotine too, so go a step lower than you otherwise would if the pack lists a low resistance.

Remember that you can always fine-tune. Many vapers keep one bottle of a higher strength for the morning and one of a lower strength for the evening, and fill separate pods for each. Pods are cheap enough that mixing and matching is a practical option.

How to fill, prime and use your pods

Filling an empty pod takes a couple of minutes, and doing it carefully is the difference between a pod that lasts and one that leaks in your pocket. Follow the same routine each time and you will rarely have problems.

• Step 1, wash and dry your hands. Oil and moisture on the pod body or contacts can interfere with the seal.
• Step 2, remove the pod from the device. Fill with the pod out of the battery section so nothing spills onto the contacts.
• Step 3, open the fill port. Pull back the silicone plug and keep it clean.
• Step 4, tilt the pod and fill slowly. Run the liquid down the inside wall and stop when it reaches just below the maximum line. Leave a small air gap. An overfilled pod is the most common cause of leaks and gurgling.
• Step 5, close the port firmly. The plug should sit flush with no gaps.
• Step 6, wipe the outside of the pod. Clear any spilt liquid from the sides and the base.
• Step 7, wait before the first draw. Let the pod stand upright for five to ten minutes so the liquid soaks into the wick.

Priming is the step most people skip, and skipping it causes most dry hits on a new pod. The wick starts dry. If you fire the coil before liquid has reached it, the cotton scorches and leaves a burnt taste that never fully goes away. Waiting a few minutes, then taking two or three gentle draws without firing at full length, gives the wick time to saturate evenly.

In use, take smooth draws of two to four seconds. Long, hard pulls pull the wick faster than it can refill, which is the other common route to a burnt taste. Pause for a few seconds between draws if you are taking several in a row, particularly with sweet or thick liquids.

Refill when the liquid is about a quarter of the way down the window. Do not run the pod nearly empty before topping up, because a dry wick can scorch instantly. Store the device upright when you are not using it, keep it out of direct sun, and keep both pods and liquid well away from children and pets.

Troubleshooting leaks, gurgling, dry hits and burnt taste

Most pod problems have simple causes. Work through the common ones in order before deciding that a pod is faulty, because a few seconds of checking often solves the issue.

• The pod leaks from the base: the most likely cause is overfilling. Wipe it clean, leave a bigger air gap on the next fill, and check that the fill plug is seated flat. Temperature change can also push liquid out, so avoid leaving the device on a hot dashboard or a radiator.
• The pod gurgles or spits: condensation or an overfilled chamber is the cause. Remove the pod, blow gently through the mouthpiece to clear the airway, wipe it dry and carry on.
• Dry or burnt hit on a fresh fill: the wick has not primed. Let the pod stand for another five minutes and use short, gentle draws. If the problem continues with a thick liquid, a lower VG liquid may suit the pod better.
• Flavour has faded: the coil is worn. This is normal ageing and is solved by a new pod.
• The device does not fire: remove the pod, check that the contacts are clean and dry, refit it firmly, and check the battery is charged. If it still fails, try a different pod to see whether the pod or the device is at fault.
• The pod will not seat: do not force it. Check that it is the right model and the right way round.
• Weak vapour: low battery, a partly blocked air inlet or a nearly empty pod can all cause this. Top up the liquid, clean the inlet with a dry tissue and charge the device.

Never try to pry a pod open to repair the coil, and do not use a pod that is cracked, as liquid can reach the battery contacts. Nicotine liquid on skin can irritate, so rinse with water if you get any on your hands, and wipe up spills promptly.

If you have gone through the checks and a brand new pod still fails, the pod may be a manufacturing fault. Contact customer service with your order number and a short description or a photo. A faulty pod should be replaced, and UK consumer law applies to faulty goods whatever the price. The sensible approach is to report it early and keep the packaging until the issue is settled.

How these pods compare with other options

It helps to see where a refillable Caliburn pod sits against the other choices in front of an adult UK vaper. None of these is right for everyone, and a fair comparison includes the places where the Caliburn pods are not the obvious pick.

Against disposables. Single-use disposable vapes have been banned from sale in Great Britain since June 2025, so refillable pods are the straightforward legal alternative for people who liked the convenience of a small device. A refillable pod costs far less per day of use than a throwaway vape and creates much less waste, because the battery and body are reused. The trade-off is that you have to fill, carry a bottle and manage a little maintenance.

Against other Caliburn pods. Uwell sells several generations of Caliburn kit, and each has its own pods. If you already own an older Caliburn, the matching pods will suit you better than these. Stay with the pod that is designed for your own device, as swapping between generations rarely works.

Against rival pod systems. There are plenty of well-regarded alternatives. Vaporesso XROS, OXVA Xlim, Geekvape Wenax and Smok Novo are all widely stocked, sell their own replacement pods at similar prices, and offer a range of coil resistances. They are all sensible choices and, in practice, the differences are modest. Differences you may notice include draw feel, button versus draw-activation, pod fill position and how easy it is to find spares locally. If you have already got one of those devices, there is no need to switch just for the sake of the Caliburn line.

• Pick Caliburn X pods if: you own a Caliburn X, you like the Uwell pod design and you want a spare supply at low cost
• Pick another line if: your device is a different model, or you already own a rival system whose pods are easier for you to find
• Pick a tank or larger kit if: you want a bigger cloud and are happy with more maintenance

Whatever you choose, buy pods that match the device you are going to use them in. Compatibility matters more than brand loyalty, and a pod that fits and seals will always beat a clever one that does not.

Who these pods suit, value for money, delivery and recycling

Who they suit. These pods are for adults who already own, or are buying, a Caliburn X. They suit adult smokers who want to move from disposable devices to a refillable system, existing Caliburn X owners who are working through their first pod, and anyone who wants to build up a small stock of spares. They are not for people under 18, for non-smokers who have never used nicotine, or for anyone who owns a different Caliburn model and has not confirmed the pod will fit.

Who should skip them. If you want a device that you never have to fill, a refillable pod is not for you. If you want very large clouds, a tank is more suitable. If you already own a rival pod system, buy that system's own pods.

Value for money. Empty pods are a low-cost consumable, and the listed price on this page is the figure to rely on. The saving comes from what you do with them. A refillable pod can be topped up many times, and a bottle of nicotine salt liquid will fill a pod repeatedly, so the cost per day of use is a fraction of what you would spend on throwaway devices. Stocking up on a few pods at once also means you are never caught out when a coil wears down.

Delivery. VapeShopOnline sells genuine stock and ships across the UK. Delivery is free on orders over £20, and orders placed before 4pm are dispatched the same day. Pods are small and light, which means it is easy to add a couple to a liquid order to reach the free delivery threshold. Age verification applies, as nicotine products can only be sold to adults aged 18 or over.

Recycling and disposal. Treat vaping equipment as electrical waste rather than household rubbish. Devices contain a lithium battery and should never go in a bin or kerbside recycling, because they can start fires in collection vehicles. Take old devices to a household waste recycling centre or to a shop that offers a vape take-back bin. The Recycle Your Electricals postcode finder will show your nearest drop-off point. Used pods are small plastic parts with a coil and traces of liquid, so check your local council guidance for what they accept. If in doubt, ask at a drop-off point and always keep used pods out of reach of children.