Vaporesso Xros 4 Nano Pod Kit Aquamarine

Overview

The Vaporesso Xros 4 Nano Pod Kit Aquamarine by Vaporesso in Aquamarine at 0mg. Free UK delivery over £20, same-day dispatch on weekday orders before 4pm.

Vaporesso Xros 4 Nano Pod Kit Overview

The Vaporesso Xros 4 Nano Pod Kit is a small, refillable pod device aimed at adult smokers and existing vapers who want something that slips into a pocket, fills with the e-liquid they choose and works without any setup beyond filling a pod. It sits in the Nano tier of Vaporesso's Xros range, which means it trades a long list of settings for a short, light body, a 2ml pod and a mesh coil designed to give consistent flavour from the first puff to the last.

This is a reusable kit, not a disposable. That distinction matters in the UK. Single-use disposable vapes were banned from sale on 1 June 2025, and reusable devices like the Xros 4 Nano are the practical alternative for anyone who liked the simplicity of a disposable but does not want to throw a battery and a coil away every few days. Instead of buying a new sealed unit, you refill the pod with a bottle of e-liquid, swap the pod when the coil wears out, and recharge the same body over USB-C for months at a time.

The Xros line has been around long enough that the general approach is well understood: a rechargeable body, a clip-in pod with the coil built into it, and a draw-activated firing system so there is nothing to configure. The Nano version shrinks that formula down further. If you have used an Xros 3 Nano or a similar pocket pod, the Xros 4 Nano will feel familiar, with refinements to the coil and the pod rather than a complete reinvention.

Because this page is long, here is what it covers and why it might help you decide:

• Specifications and box contents, so you know what you are getting and what you still need to buy.
• Performance, flavour and coil technology, written in plain terms rather than marketing language.
• Nicotine strength guidance for UK-legal e-liquids, which are capped at 20mg/ml.
• Who the kit suits and who should skip it, including an honest comparison with similar pod kits.
• Setup, troubleshooting and value for money, so the first week with the device goes smoothly.

Vaping is intended only for adults who already smoke or vape. It is not risk-free, it contains nicotine in most e-liquids, and it is not sold to anyone under 18. If you do not currently use nicotine, this product is not for you.

What Is in the Box and Key Specifications

Box contents can vary slightly between batches and regions, so treat this list as a guide and check the packaging when it arrives. A typical Xros 4 Nano kit includes:

• The Xros 4 Nano device body, with its integrated rechargeable battery.
• One pod with a COREX 2.0 mesh coil already fitted, ready to be filled.
• A USB-C charging cable.
• A user manual and a warranty card.

The kit does not come with e-liquid. You will need to buy a bottle separately, and in the UK refill bottles are limited to 10ml for nicotine-containing liquids. You will also want a spare pod or two if you plan to use the device daily, because the coil is built into the pod and eventually wears out.

Here are the headline specifications as we understand them from Vaporesso's published information for this range. Where a figure is approximate we say so, and the packaging should always be treated as the final word.

• Battery: built-in rechargeable cell of around 1000mAh.
• Charging: USB-C, using a standard phone charger or a computer port.
• Pod capacity: 2ml, which is the maximum size allowed for refillable tanks and pods sold in the UK.
• Coil: COREX 2.0 mesh coil built into the pod.
• Output: modest power, in the region of 20 watts at most, managed automatically.
• Airflow: adjustable, so you can move between a tighter and a more open draw.
• Activation: draw-activated, so the device fires when you inhale.
• E-liquid compatibility: nicotine salt and freebase e-liquids, with a preference for liquids around 50/50 or a modestly higher VG ratio.

These are specifications you can verify against the leaflet in the box. We prefer to give approximate ranges where a number could differ between production runs rather than quote a figure we cannot stand behind. In day-to-day use the numbers that matter most are the 2ml pod, the 1000mAh battery and the coil life, and each of those gets its own section below.

Performance and Vapour Delivery

The Xros 4 Nano is a low-power pod device, and its performance should be judged against that class rather than against a large mod. It is designed to produce a smooth, moderate cloud with a draw that sits between a cigarette-like mouth-to-lung pull and a looser restricted direct-to-lung pull, depending on where you set the airflow.

With the airflow tightened, the draw is closer to a cigarette. You pull slowly into your mouth, then inhale. Throat hit is more noticeable here, particularly with nicotine salts, and vapour volume is lower. This is the setting most people moving from smoking will find natural. Opening the airflow gives a lighter, airier draw and a bit more vapour, which suits freebase nicotine at lower strengths and anyone who prefers to inhale straight into the lungs.

The mesh coil heats quickly, so there is very little delay between inhaling and feeling vapour. That responsiveness is one of the reasons mesh coils became standard in this category. A well-primed coil should deliver similar flavour on the tenth puff and the three-hundredth, with the usual caveat that flavour fades as the coil ages.

How many puffs can you expect from a pod? Pod kits do not have a fixed puff count the way disposables claim, because it depends on how you draw. As a rough rule of thumb, a 2ml pod is good for somewhere in the region of 400 to 600 draws at typical power. Heavier, longer inhales on a more open airflow use liquid faster; short, tight draws stretch it. If you use a nicotine salt at 10mg or 20mg, you will tend to take shorter and fewer puffs than with a low-strength freebase, which also stretches the pod.

A few practical observations on delivery:

• Consistency: output is regulated, so vapour should not fall away noticeably until the battery is nearly empty.
• Ramp-up: a freshly filled pod needs several minutes to soak the cotton. Skipping this is the single most common cause of poor first impressions.
• Chaining: back-to-back puffs without a rest can dry out the wick, so give the coil a few seconds between draws.
• Noise: expect a faint hiss from the airflow rather than any loud whistle.

The Xros 4 Nano is not trying to be a high-output device. If you want large clouds, a sub-ohm mod or a larger pod system will do that job. If you want a discreet, steady vape that does one thing predictably, the performance profile is a sensible fit.

Flavour Profile and What to Fill It With

Because this is a kit rather than a pre-filled disposable, it has no flavour of its own. The flavour you get is the flavour of the e-liquid you fill the pod with. What the hardware contributes is how faithfully the coil reproduces that liquid, and mesh coils such as the COREX 2.0 have a reputation for delivering clean, defined flavour with less of the muted, burnt edge that a cheap coil produces as it ages.

This listing groups nine variants of the Xros 4 Nano, and they differ in the colour and finish of the body. The internals are the same across them, so choose on appearance. The flavour question is entirely about the liquid you pair with it. Here are some e-liquid profiles that tend to work well in a small 2ml pod with a mesh coil:

• Blue raspberry and blue razz: a popular fruit profile that holds up well on a mesh coil, though the sweetness can darken the cotton over time.
• Strawberry ice: a straightforward fruit and cooling combination that suits the lighter airflow setting.
• Peppermint and spearmint: clean menthol profiles that many ex-smokers use as a replacement for menthol cigarettes.
• Classic tobacco and RY4 blends: tobacco liquids with a caramel or vanilla edge, worth trying with a tighter airflow for a more cigarette-like feel.
• Mango and peach blends: juicy fruit profiles that show off the coil's flavour definition.
• Custard and vanilla desserts: richer and thicker, so they are better suited to a 50/50 mix than to a very high VG liquid.
• Cola and soft drink flavours: light, fizzy-tasting profiles that work well with nicotine salts.
• Lemon and berry blends: sharp, bright flavours that suit the more open airflow.

A few guidelines will get the most out of whichever profile you choose. First, avoid very thick, high-VG liquids that are marketed for sub-ohm mods, because they can struggle to wick through a small pod coil and cause dry hits. Liquids labelled 50/50 VG/PG, or nicotine salt liquids in the 50/50 range, are generally the safest match. Second, very sweet liquids and dessert flavours tend to build up residue on the coil faster, so expect to change pods slightly more often. Third, avoid switching between very different flavours in the same pod; residual taste will linger, and a fresh pod is cheaper than a ruined fruit flavour.

Menthol and ice flavours do not last longer than other profiles, but their cooling agent can mask a coil that is starting to fade, which is worth remembering when you decide whether it is time to swap the pod.

Design and Build Quality

The Nano designation tells you what to expect: this is among the smaller devices in the Xros range, and the body is short, narrow and light enough that it disappears in a jeans pocket. The shape is a rounded rectangle, which makes it comfortable in the hand and easy to hold between the fingers without it feeling bulky.

The body is a one-piece unit with the battery sealed inside. The pod clicks into the top, held by magnets or a firm friction fit depending on the production run, and removes cleanly when you need to refill or replace it. There are no screws, no threads and no loose parts to lose, which is part of the appeal for people who do not want to tinker with their device.

Build quality in this price band is generally good, and Vaporesso is an established manufacturer with a reasonable record on fit and finish. A few things to look for when your kit arrives:

• Pod seating: the pod should sit flush with no visible gap and no wobble. If it rocks, remove it and re-seat it before assuming a fault.
• Finish: the body coating resists fingerprints reasonably well but, as with any painted metal or coated plastic, will show scuffs if it lives in a pocket with keys.
• Airflow control: the airflow adjustment should move with a firm, controlled action rather than feeling loose.
• USB-C port: it should accept the cable snugly without needing force.

The mouthpiece is shaped for a comfortable fit between the lips. It is not an extra-wide drip tip, so if you prefer a broad, flat mouthpiece you may find it a touch narrow, but most users adapt quickly and the slim profile keeps the whole device compact.

One honest design trade-off is that a sealed battery means the device has a finite life. After a couple of years of daily use the battery will hold less charge, and unlike a replaceable-cell mod you cannot swap it out. For a device of this size and price that is normal, but it is a reason to look after the battery, which the next section covers.

The pod is made from clear or semi-clear material on most variants so you can see how much liquid remains. That is useful: running a coil dry is the quickest way to ruin it, and being able to see the liquid level at a glance is more reliable than guessing from puff count.

Battery Life and Charging

The Xros 4 Nano carries an integrated battery of around 1000mAh, which is generous for a device this small. To put that in context, the battery has to power only a low-wattage coil, so it goes further than the same capacity would in a high-power device.

For a moderate user, a full charge typically lasts a day of normal use and often a little longer. A heavier user who is vaping steadily through the day may want to top up in the evening. Battery life is not a fixed number: it depends on your puff length, your airflow setting and your coil resistance, so treat any hours-of-use claim as an estimate.

Charging is over USB-C. A full charge from empty usually takes in the region of an hour with a standard phone charger, though a low-powered computer port may be slower. Some practical charging habits will help the battery last longer:

• Use a reputable charger. A standard 5V phone charger or a computer USB port is fine. Avoid unbranded or damaged chargers.
• Do not leave it charging unattended overnight. Modern devices have protection circuits, but it is sensible practice with any lithium battery.
• Charge before it is completely flat. Lithium cells prefer being topped up to being run empty repeatedly.
• Keep it out of heat. A hot car or a sunny windowsill is bad for the battery and can cause the pod to leak.
• Stop using a damaged device. If the body is swollen, hot, cracked or smelling of burning, stop using it and recycle it safely.

Most kits of this type include short-circuit, overcharge and low-voltage protection, and the device will usually signal low battery with an indicator before it stops firing. If the device does not respond when you inhale and the indicator flashes, it normally means the battery is too low or the device is locked, and a short charge will restore it.

Recycling: never put a vape, a battery or a used pod in your household bin or general recycling. In the UK, vapes contain lithium batteries that can start fires in bin lorries and recycling plants. Retailers that sell vaping products are legally required to take back old devices, and many supermarkets, household recycling centres and local council drop-off points accept them as small electrical items. Rinse nothing out into the sink, and place the device in the electrical waste container rather than the general rubbish.

COREX 2.0 Mesh Coil Technology

The coil is the heart of any pod system, and the Xros 4 Nano uses Vaporesso's COREX 2.0 mesh coil. Understanding what that means helps you get the longest life and the cleanest flavour from each pod.

A conventional wire coil wraps a resistance wire around a cotton wick. A mesh coil replaces that wire with a flat, perforated metal sheet that lines the wicking area. The sheet has a much larger surface area in contact with the cotton, so the e-liquid heats more evenly and more quickly. In practice that means faster response, more consistent flavour and less of the localised hot spots that cause a burnt taste with a wire coil.

Vaporesso's COREX technology is built around the idea of an internal cotton and mesh structure designed to keep wicking balanced with the heat generated. The second generation refines that design for steadier liquid supply and flavour. We would not claim that it removes every issue, and no coil is immune to dry hits if it is poorly primed or used with the wrong liquid, but it is a sound design for a small pod.

Some practical points about the coil:

• Resistance: pods are sold in different resistances. Lower resistance values, around 0.4 to 0.6 ohm, produce warmer vapour and more of it, and suit a looser draw. Higher values, around 0.8 to 1.0 ohm, give a tighter, cooler draw with a stronger throat hit from nicotine salts. The resistance of the pod in your kit is printed on the pod or its packaging.
• Coil life: expect roughly one to three weeks per pod, depending on how often you vape and what you use. Sweet liquids shorten it; lighter fruit and menthol liquids tend to extend it.
• Priming matters: the cotton needs to be saturated before the first puff. A dry-primed coil can burn on the first draw and be ruined permanently.
• Signs of a worn coil: muted or burnt flavour, a harsh throat hit, reduced vapour, or liquid that looks dark and sludgy in the pod.

Pod compatibility is worth checking before you buy spares. Vaporesso has kept pods broadly interchangeable across parts of the Xros range, but not every generation fits every body, so confirm that a replacement pod is listed as suitable for the Xros 4 Nano rather than assuming. Using an incompatible pod can cause poor contact, leaks or a non-firing device.

Finally, a note on cleanliness: the coil is sealed inside the pod and cannot be cleaned or rewicked. When the flavour fades, the correct response is a new pod, not trying to flush or dry-burn the old one.

Choosing the Right Nicotine Strength

The kit itself does not contain nicotine, so strength is a decision you make when you buy e-liquid. UK rules cap the nicotine strength of e-liquid at 20mg/ml, and refill bottles for nicotine liquids at 10ml. If you see anything sold above those limits, it is not legal for UK sale. The limit also applies to the old disposables market, which is part of why many people have moved to refillable kits.

The right strength depends mainly on how much you smoked or vaped before and on the type of nicotine in the liquid. The general guidance below is a starting point rather than medical advice; if you are unsure, a local stop-smoking service or pharmacist can give you tailored help.

Nicotine salt liquids are the usual choice for small, low-power pod kits like this one. They deliver nicotine smoothly and rapidly with less throat harshness than freebase at the same strength:

• 20mg/ml: suited to heavier smokers, for example someone who smoked a pack a day or more. It is the strongest legal level and can feel firm on the throat at tight airflow.
• 10mg to 12mg: a common middle ground for moderate smokers or for people who find 20mg too sharp. Many users move here after a few weeks.
• 5mg to 6mg: for lighter users or for people reducing their nicotine intake over time.

Freebase nicotine liquids are typically sold in lower strengths and have a harsher throat hit at the same level:

• 3mg to 6mg: works with the more open airflow settings and a direct-to-lung style of inhaling.
• 12mg to 18mg: historically used for mouth-to-lung vaping, but strong freebase can be unpleasant in a pod system, so most users prefer salts at that level.

Signs you have the strength wrong are fairly clear. If you feel dizzy, nauseous, have a racing heart or a harsh burn in your throat after a few puffs, the strength is too high and you should stop and drop down. If you find yourself chain-vaping, get cravings quickly, or feel unsatisfied, it may be too low for your needs.

If you are using the kit to stop smoking, a higher strength at the beginning is often more effective than a low one that leaves you reaching for cigarettes. You can then step down gradually. Do not use nicotine if you are pregnant, have heart conditions or take medication, without first speaking to a healthcare professional. Nicotine-free liquids are also available for those who want to continue the habit without the nicotine.

Who the Xros 4 Nano Suits and Who Should Skip It

No device suits everyone, and an honest buying guide should say so. Here is a clear view of who is likely to be satisfied and who might be happier elsewhere.

The Xros 4 Nano suits:

• Smokers switching to vaping. The simple operation, tight-draw option and nicotine salt compatibility make it an easy first device.
• Former disposable users. It offers the same grab-and-go convenience with a pod you refill, which is cheaper over time and produces far less waste.
• People who value size. If you want a device that is barely noticeable in a pocket or small bag, this is a sensible choice.
• Vapers who like flavour variety. You can use any suitable 10ml bottle rather than being tied to one flavour.
• Anyone who wants no settings. There is no menu to navigate, which is a benefit if you dislike adjusting wattage or temperature.

You might want to skip it if:

• You want large clouds. A 20-watt-class pod will not produce the volume of a sub-ohm device.
• You want to adjust power. If you like fine control over wattage, you will find this too limited.
• You vape very heavily. A 2ml pod and a 1000mAh battery mean frequent refills and a top-up charge for someone who vapes almost continuously.
• You use thick, high-VG liquids. Those liquids can struggle in a small pod coil.
• You want a replaceable battery. The cell is built in and cannot be swapped.
• You do not currently smoke or vape. Nicotine is addictive, and vaping is not recommended for non-smokers or for anyone under 18.

It is also worth being realistic about the learning curve. Refilling a pod is simple, but it is a step that disposables did not require, and the first few fills can be messy until you find the technique. If you are the sort of person who dislikes the idea of handling bottles of liquid, a pre-filled pod system might be a better fit than a refillable one, though pre-filled systems carry their own ongoing cost per pod.

For most adults who want a straightforward, compact refillable pod device, the Xros 4 Nano is a reasonable choice, and its limitations are the predictable ones for its size.

How to Fill, Prime and Use It

Setting up the Xros 4 Nano takes only a few minutes, but the order of steps matters. Following it carefully will prevent most of the leaks and dry hits that new users run into.

Step by step:

• Charge first. Give the battery a short charge before you start, particularly if it has been in transit or on a shelf.
• Remove the pod. Pull it gently out of the body and take off any protective film or plug that came with it.
• Open the fill port. The pod has a fill port, usually covered by a small silicone bung. Lift or pull it aside to expose the hole.
• Fill slowly. Hold the pod upright and insert the bottle nozzle into the port. Fill gently down the inside wall, stopping at or just below the maximum line. Do not overfill; leave a small air gap.
• Avoid the central tube. Be careful not to let liquid enter the central airflow tube, which will flood the coil.
• Close the port. Press the bung back in fully so it seals.
• Wait for the cotton to soak. Leave the pod upright for five to ten minutes. This is the priming step and it is the most important part of the process.
• Insert the pod and check the airflow. Click it into the body and adjust the airflow ring to your preferred setting.
• Take gentle first puffs. Do the first few draws slowly and without chaining, so the wick stays saturated.

Activating and locking: the device is draw-activated, so there is nothing to press for normal use. If your unit has a button for locking and unlocking, the leaflet in the box covers the sequence, which on many devices is five quick presses. Locking the device before you put it in a bag prevents accidental firing.

Everyday care:

• Refill before the pod is fully empty; running it dry damages the coil.
• Wipe the contacts and the mouthpiece with a dry tissue occasionally.
• Store the device upright where you can, and away from heat and direct sunlight.
• Keep e-liquid and the device away from children and pets. Nicotine is toxic if swallowed.
• When changing flavour, fit a new pod rather than trying to flush the old one.

When the pod needs replacing, pull it out, fit the new one, fill and prime it as above, and dispose of the old pod through an electrical recycling point, since pods contain a metal coil.

Troubleshooting Common Problems

Most problems with pod kits have simple causes. Before concluding that a device is faulty, work through these common situations.

The device does not fire or produce vapour.

• Check the battery. A low battery is the most common cause, so charge it for a few minutes and try again.
• Check the device is not locked. If your model has a lock function, unlock it as described in the manual.
• Remove the pod and re-seat it firmly. Poor contact between the pod and the body stops the device firing.
• Wipe the metal contacts with a dry cloth in case residue is interfering with the connection.
• Check that the airflow is not blocked and that the pod is not completely empty.

The vapour tastes burnt or harsh.

• The coil may be dry. Refill the pod, wait ten minutes and try again with slow draws.
• The coil may be worn. If the flavour has faded over a week or two, replace the pod.
• The liquid may be too sweet or too thick for the coil. Try a 50/50 liquid.
• You may be chaining puffs. Leave a gap of a few seconds between draws.

The pod leaks.

• Check that the fill bung is fully seated.
• Make sure you did not overfill or let liquid into the central tube.
• Pressure changes in an aeroplane or a hot environment can push liquid out, so store the device upright and avoid heat.
• Check that the pod is seated correctly in the body.
• A cracked pod will leak and should be replaced.

Gurgling or spitting. This is usually caused by condensation or by liquid pooling in the airflow path. Blow gently through the mouthpiece with the pod removed, or wipe it dry, and avoid overfilling.

The device will not charge.

• Try a different cable and a different charger.
• Check the USB-C port for lint or debris and clear it carefully with a wooden toothpick, never metal.
• If the device has been left completely flat for a long period, leave it on charge for a while before expecting a response.

Sore throat or a strong cough. The nicotine strength may be too high, the airflow too tight, or the liquid unsuited to you. Try a lower strength or a more open airflow.

If none of these steps resolves the problem and you believe the device is faulty, stop using it and contact the retailer. Do not attempt to open the body, because the battery inside is not user-serviceable.

Value for Money and How It Compares

Value in a pod kit is about cost per week of use, not only the price on the box. The Xros 4 Nano is priced in the entry-to-mid range for refillable pod kits, and the economics work as follows. You pay once for the body, then recurring costs come from e-liquid and replacement pods. A 10ml bottle fills a 2ml pod about five times, and a pod typically lasts one to three weeks, so a regular user might spend a modest amount each month on liquid and pods combined. For most smokers, that remains well below the cost of cigarettes, and for former disposable users it is cheaper than buying a new single-use unit every few days.

There is also a waste argument. A refillable device means one battery and one body lasting a long time, with only a small pod discarded every few weeks, in place of an entire device with a lithium battery being thrown away each time. In the UK, where disposables are now banned, this is the direction the market has gone.

How does it compare with similar pod kits? A fair comparison, based on published specifications, looks like this:

• Versus the Xros 3 Nano: the earlier model is the closest relative. The Xros 4 Nano is the newer iteration with an updated coil design, so if both are priced similarly the newer one is the more sensible buy; if the older one is discounted, it remains a capable device.
• Versus the Oxva Xlim range: Oxva's pods are well regarded for flavour and the range has a large pod ecosystem. The Xlim is typically a little larger and offers more output, so it suits someone who wants more vapour, while the Xros 4 Nano is the more compact option.
• Versus the Uwell Caliburn series: Caliburn kits are also popular entry-level pod systems with a strong following among first-time switchers. They are similar in concept, with differences in pod design and fit, and choosing between them often comes down to personal preference and what is in stock.
• Versus the Voopoo Vmate or Smok Novo range: these are comparable in size and price. Each has its own pod format, so the deciding factors are usually comfort, available pods and finish rather than a large difference in performance.
• Versus pre-filled pod systems: a pre-filled system is simpler because there is no filling, but you are tied to the flavours the maker sells and the ongoing cost per pod tends to be higher.

None of these is an automatic better choice. The Xros 4 Nano makes sense if you want a small, simple refillable device from a manufacturer with a deep Xros pod range, and if you are happy with moderate power. If you need greater output, a bigger battery or a replaceable battery, look at a larger device.

Finally, buy from a reputable UK retailer that checks age, supplies genuine Vaporesso stock and provides a clear returns route. A very low price on a branded device from an unfamiliar source is a warning sign for counterfeits, which can be unsafe and perform poorly.