OXVA Unicoil (Pack of 5) 0.5Ohm

Overview

The OXVA Unicoil (Pack of 5) 0.5Ohm by Oxva in 0.5Ohm at 0mg. Free UK delivery over £20, same-day dispatch on weekday orders before 4pm.

OXVA Unicoil (Pack of 5): what you are actually buying

The OXVA Unicoil (Pack of 5) is a multipack of replacement coil heads for OXVA hardware built around the Unicoil platform. A coil head is the consumable heart of any refillable vape. It holds the heating element and the wicking material that together turn e-liquid into vapour. Everything else in your setup, the tank, the battery, the chip and the casing, is designed to last for months or years. The coil is designed to last for days or weeks, and replacing it on time is the single most effective piece of routine maintenance you can do.

This listing is an accessory, not a complete kit. There is no battery, no tank and no e-liquid in the box. You are buying five coil heads, which means five separate working lives of fresh cotton and a clean heating element. For most adult vapers that is somewhere between a month and a few months of use depending on how heavily you vape, what you put in the tank and how carefully you prime each new head.

The pack is offered in three variants on this page. The variants differ in coil specification, normally the resistance and the power range printed on the coil, so you should choose the variant that matches both your device and the way you like to vape. Nothing else about the pack changes between variants: you still get five heads, packed together, ready to fit.

Here is a quick summary of what this product is, and what it is not:

• What it is: five replacement coil heads from OXVA, sold as a single pack.
• What it is not: a starter kit, a pod, a battery or a bottle of e-liquid.
• Who makes it: OXVA, a brand best known for its pod systems, mod-style kits and the coil platforms that go with them.
• Who it suits: adult vapers who already own compatible OXVA hardware and want to keep it running at its intended flavour and vapour quality.
• What to check first: that your tank or device actually takes Unicoil heads before you add the pack to your basket.

The rest of this guide covers compatibility, how the coil is built, what resistance and wattage mean in practice, flavour, battery behaviour, nicotine strength choices, installation, troubleshooting, value, alternatives and the UK rules that apply. It is written to help you buy the right variant once rather than guessing and reordering.

Compatibility: matching Unicoil heads to your OXVA hardware

Coil heads are not universal. Every manufacturer uses its own base design, its own thread or push-fit style and its own electrical contact layout, and even within one brand there are several coil families that look similar but do not interchange. The most common reason a new vaper is unhappy with a coil purchase is simply that they bought the wrong family for their tank.

The name Unicoil identifies the platform. If your tank, pod-mod or cartridge system is documented as using Unicoil heads, this pack is the correct consumable. If your device takes a different OXVA coil family, or a pre-filled or pre-built pod, then this pack will not fit and you should look for the head that matches your specific model instead.

Before ordering, run through this short checklist:

• Read the manual or the box. The coil family is almost always named in the specifications section. Look for the word Unicoil.
• Look at the old coil. Many heads have the family name and the resistance printed or etched on the metal collar. Unscrew the head you are using now and read it.
• Check the tank, not only the battery. The battery section of a kit does not decide the coil. The tank or pod that screws or clips onto it does.
• Match the variant. If you are replacing like for like, choose the same resistance as your current coil. If you want to change style, read the performance section below before switching.
• Do not force it. A correct coil seats smoothly. If you feel a thread cross or hard resistance, stop and recheck compatibility.

It is also worth knowing that coil platforms are sometimes shared across more than one product from the same brand. A coil family that appears in a tank today may also be used in a newer tank or pod-mod released later. That is a practical advantage of buying into a platform: you are not locked to a single device, and a spare pack remains useful if you upgrade within the range. The reverse is also true. If a brand retires a platform, spare heads for older hardware become harder to find, which is why buying a pack of five rather than a single coil makes sense once you are sure of the fit.

If you are unsure which family your OXVA device uses, contact us with the model name and, if you can, a photo of the old coil. Checking takes a minute and avoids a return.

Build quality and coil technology

A coil head is a small assembly, and the quality of that assembly decides how long it lasts and how consistently it behaves. In a Unicoil head you are paying for four things working together: the heating element, the wick, the housing and the electrical contacts.

Heating element. Modern coils use either a wound wire or a mesh sheet. Mesh heads use a flat, perforated metal strip folded or rolled into a shape that sits against the cotton. The large surface area heats quickly and evenly, which tends to reduce the hot spots that scorch cotton on a conventional round-wire coil. Wire heads are simpler and can produce a rounder, more diffused vapour. The exact element in your chosen variant is stated on the product listing and on the pack, so use that as the authority rather than assuming.

Wick. The cotton or organic fibre pressed against the element is what actually delivers liquid to the heat. Its density matters. A very loose wick floods easily and leaks, while a very tight wick starves the coil and causes dry hits. Brands tune this to the resistance and intended power range of each head, which is another reason to use the wattage printed on the coil rather than your own guess.

Housing and sealing. The metal collar and silicone seals keep liquid where it belongs. Good seals mean no weeping from the base and a firm click or thread into the tank. If you have ever had a tank that leaks from the airflow slots, a worn seal or a badly seated head is the usual cause.

Contacts. The base of the coil carries current from the battery to the element. Clean, correctly sized contacts give a stable connection, and a stable connection is what lets the chip read resistance accurately and fire at the right power.

What you can reasonably expect from a coil of this type:

• A consistent fit with the tank it was designed for, with no wobble.
• A wick that primes fully within a few minutes of soaking.
• A resistance reading from your device that matches the figure on the coil, within normal tolerance.
• Flavour that stays consistent for most of the coil's life before tapering off.

Each coil is a sealed consumable, so there is nothing to build or wrap yourself. That makes the pack suitable for people who want a tidy, predictable routine rather than a hobby. Keep the heads in their packaging until you are ready to use them, and store them somewhere cool and dry, away from direct sun and from anything that could crush the collar.

Performance and vapour delivery: resistance, wattage and coil life

Coils do not have puff counts in the way that single-use devices once did. The meaningful performance measures for a coil are its resistance, the power range it is designed for, and how much e-liquid it processes before flavour fades. Understanding these three lets you predict how a pack will behave.

Resistance and power. Resistance is measured in ohms, shown as Ω. A lower number lets more current flow, which heats the element harder at a given voltage and produces a larger amount of vapour. A higher number draws less current and gives a cooler, tighter, more restrained vape. As a rule of thumb, lower resistance heads are paired with open airflow and are used for a big, direct-to-lung inhale. Higher resistance heads are paired with tighter airflow and suit a mouth-to-lung draw, which feels more like smoking a cigarette. Your three variants will sit at different points on that scale, and the number printed on each pack tells you which one is which.

Here is some simple arithmetic to make that concrete. Power equals voltage squared divided by resistance. A 0.4Ω coil fired at 30W needs roughly 3.5V at the coil. A 0.8Ω coil fired at the same 30W needs about 4.9V. The chip handles this for you, but it shows why high resistance coils at high power are hard on a device and why low resistance coils pull more current from the cell.

Power range. Every coil has a recommended wattage window. Start at the low end of the stated range, take a few puffs, and increase in small steps until the vapour temperature feels right. Going above the top of the range scorches the cotton quickly and ruins the head. Going below the bottom produces weak, lukewarm vapour and, over time, can cause gurgling as liquid pools in the coil.

Coil life. A coil typically handles somewhere in the region of 15 to 40 ml of e-liquid in normal use, which is roughly 8 to 20 refills of a legally capped 2 ml tank. Several things push you toward the shorter end:

• Sweet, dark or dessert-style liquids, which leave sugar residue on the element.
• High wattage settings and long, hard draws.
• Chain vaping without letting the cotton re-saturate between puffs.
• Priming too quickly, leaving dry spots in the wick.

For most people a head lasts between one and three weeks. With five in the pack, you are covering a substantial stretch of use, and the three-variant range means you can also keep different resistances if you own more than one compatible tank.

If you notice your vapour tapering rather than ending abruptly, that is normal coil ageing, not a fault. Flavour dulls first, vapour thins next, and a faint burnt note signals that the head is finished.

Flavour profile: what to expect from this coil

A coil does not have a flavour of its own, but it shapes how any flavour reaches your palate. That is why two people using identical liquid in different coils describe entirely different experiences. Three properties decide the character: the temperature of the vapour, how much liquid is vaporised per puff, and how cleanly the cotton wicks.

Temperature. Cooler vapour carries delicate notes, fruit, menthol and subtle tobaccos, more clearly. Warmer vapour brings out sweetness, caramel, custard and bakery profiles, but if it gets too hot the same sweetness turns acrid. A mesh style head, the sort commonly found in modern coil platforms, spreads heat evenly. That tends to give a smoother, more even flavour from the first puff to the last, instead of the sharp peaks and drop-offs you can get with a small round wire.

Vapour volume. Lower resistance variants produce more vapour per puff, which dilutes the flavour in a larger cloud but increases intensity overall. Higher resistance variants produce less vapour and a more concentrated flavour in each puff, which many people prefer for tobacco, menthol and simple fruit profiles.

Cleanliness. A new coil tastes clean. As it ages, residue accumulates on the element and mutes flavour. If you switch e-liquids often, you will notice that a coil retains a little of the previous liquid. Sweet or minty liquids are especially persistent, so many users dedicate a coil to a particular flavour type, or simply accept that mixing profiles on one head produces a muddy result.

Practical tips for the best taste without making unrealistic claims:

• Let a new head soak for at least five minutes before the first puff.
• Take the first few puffs gently, at the low end of the power range, to bed in the cotton.
• Use liquids with a vegetable glycerine and propylene glycol mix suited to your style. A higher PG ratio is thinner and wicks easily, while a higher VG ratio is thicker and gives larger clouds.
• Avoid very thick, high-sweetener liquids in a high-resistance head, as they can struggle to wick.
• Rinse the tank thoroughly and let it dry before moving to a very different flavour family.

If your goal is a clean, consistent flavour across the life of the head, the main discipline is not the coil itself but how you prime it and how hard you drive it. A well-primed coil run at a sensible wattage will deliver the flavour of your liquid faithfully for most of its life.

Battery draw, charging and power behaviour

The Unicoil pack contains no battery, but the coil you choose directly affects how your battery behaves. Lower resistance heads pull more current for the same wattage, so a device with a small internal cell drains faster when paired with a low-resistance head than with a higher-resistance one. This is simple physics rather than a product defect, and it explains many complaints about battery life that are really coil-choice questions.

Consider a few illustrative numbers. At 25W with a 0.6Ω coil, the current at the element is about 6.5A. At 25W with a 1.0Ω coil, it falls to about 5A. Across a day of use those differences add up, and a pod-mod with a modest internal battery will feel them. If you are chasing longer time between charges, the higher resistance variant is the more economical choice, provided it suits the vape style you want.

Practical charging guidance for hardware that uses coils like this one:

• Use the cable supplied with the device, or a good-quality USB cable and a standard wall adaptor. Avoid unbranded fast chargers with unknown specifications.
• Do not charge unattended overnight on a soft surface such as a bed or sofa. Lithium cells should always be charged on a hard, non-flammable surface.
• Unplug when full. Most modern devices have charge protection, but there is no benefit to leaving a full cell connected.
• Keep the device out of direct heat. A car dashboard in summer is not a safe place to leave a vape.
• Stop using damaged cells. If the casing is swollen, hot to the touch while idle or smells odd, stop using it and take it to a proper recycling point.

The coil also affects battery life through how efficiently it uses the power you give it. A coil that wicks well turns most of the energy into vapour. A coil that is gunked up with residue, or that is only partly saturated, wastes energy as heat and gives poor output for the same battery drain. Replacing a tired coil often restores what feels like a healthy battery, which is worth remembering before assuming the device itself has degraded.

If your device shows a resistance error or refuses to fire after a coil change, remove the head, check that the contacts are clean and dry, and refit it firmly. A loose or contaminated contact is the most common cause, and a quick wipe with a dry, lint-free cloth usually solves it.

Nicotine strength guidance for use with Unicoil heads

A coil pack contains no nicotine, so there is no nic strength to choose on the pack itself. But the coil you fit has a significant effect on how much nicotine you actually take in per puff, so strength selection and coil selection need to be considered together. In the UK, e-liquid for refillable devices is capped at 20mg/ml of nicotine and sold in bottles of no more than 10ml. Those caps are the legal ceiling, not a target.

The basic principle is this. The more vapour a coil produces per puff, the less nicotine strength you need in the liquid to feel satisfied. The less vapour a coil produces, the more strength you need.

• Lower resistance, open airflow, direct-to-lung vaping: a large amount of vapour is inhaled with each draw. Lower strength liquid, often in the range of 0mg to 6mg of freebase nicotine, is the norm. Pushing a high-strength liquid through a powerful low-resistance coil can feel harsh and leave you light-headed.
• Higher resistance, tighter airflow, mouth-to-lung vaping: vapour per puff is small, so a stronger liquid is needed to deliver an equivalent hit. Nicotine salt liquids at 10mg to 20mg are widely used here because they are smoother at higher strengths than freebase nicotine.
• Middle ground: if you sit between the two styles, a 3mg to 6mg freebase liquid, or a 10mg salt, is a sensible starting range.

Some practical rules for choosing a strength:

• If you smoke around 10 or fewer cigarettes a day, begin at the lower end of the range for your style.
• If you smoke a pack a day, you may need to start higher, but do not jump straight to the 20mg cap unless you are using a tight mouth-to-lung draw.
• If you feel dizzy, nauseous or get a harsh throat hit, drop the strength or reduce your wattage.
• If you find yourself reaching for the device every few minutes without satisfaction, increase the strength a step rather than the wattage.

Never use nicotine e-liquid if you are under 18, if you do not already use nicotine products, or if you are pregnant or have a heart condition, without first speaking to a healthcare professional. Vaping is intended for adult smokers who want an alternative to tobacco, not for people who have never smoked. Zero-nicotine liquid works with these coils too and is a legitimate choice for anyone who has finished stepping down.

If you change your coil variant, give your nicotine strength a quick review. A move from a high-resistance to a low-resistance head with the same liquid can feel like a noticeable jump in strength.

Who this pack is for, and what it costs to run

The OXVA Unicoil (Pack of 5) is a replacement part, so the buyer is almost always someone who already owns compatible hardware. That narrows the audience considerably, and it is worth being honest about the cases where this is the right purchase and the cases where it is not.

Good fit:

• Owners of OXVA tanks or pod-mod systems that take Unicoil heads, who want to stock up so they never run out mid-week.
• Vapers who like a consistent, predictable setup and prefer to change coils on a schedule rather than push them until they fail.
• People who own more than one compatible device and can use the extra heads across all of them.
• Anyone who wants a lower per-coil cost than buying single heads, and who is happy to hold spares at home.
• Former smokers who have settled on a style and want to keep it running without experimenting.

Think twice, or check compatibility first:

• Anyone who is not certain which coil family their device uses. A wrong-family pack cannot be fitted.
• Brand new vapers without any hardware. You need a compatible device first, and a starter kit that includes its own spare coil is usually a sensible entry point.
• Owners of pre-filled pod systems. Those devices use sealed pods, not replaceable heads.
• People who change devices every few months. A pack of five spare heads for a device you no longer use is money wasted.

Not for:

• Anyone under 18. It is illegal to sell vaping products to under-18s in the UK, and we will not do so.
• Non-smokers. Vaping is not risk-free, and it is not recommended for people who do not currently use nicotine.

If you are weighing the pack up as a purchase, think about your own consumption. A light user may take two months to get through five heads, which is fine as long as the unused ones are kept sealed and dry. A heavy user might get through the pack in a month, in which case it is worth ordering a second pack at the same time to avoid a gap. In both cases, buying in multipacks is more convenient than ordering single coils, and it removes the temptation to squeeze extra life from a failing head.

The sensible way to compare coil prices is to think in terms of cost per week of vaping rather than cost per pack. A pack of five heads is a fixed purchase that covers a predictable stretch of time, and that makes it easy to budget.

Here is the framework. Take the price shown on this page, divide it by five to get the cost per coil, and then divide that figure by the number of weeks a coil lasts for you. A light user who changes every three weeks pays a lower weekly figure than a heavy user who changes every week, but both are paying a modest amount compared with the cost of the liquid itself. In most setups the coil is the smaller part of the running cost, and a worn coil also wastes liquid by producing less flavour and vapour per millilitre, so changing on time is usually the more economical route.

Points that affect the value of a multipack:

• Per-coil cost. Multipacks are priced lower per head than individual coils from the same range, which is the reason they exist.
• Fewer emergency orders. Having spares in the drawer means you do not pay for urgent delivery or a more expensive local top-up.
• Longer device life. Regularly replaced coils protect the contacts and reduce stress on the battery, keeping the device healthy for longer.
• Liquid saving. A fresh coil vaporises liquid efficiently. A tired one demands more power and more puffs for the same satisfaction.
• Shelf life. Sealed coil heads store well for a long time if kept dry. A pack of five bought now will still be usable in six months.

It would be unfair to claim that this is the cheapest way to vape, because it is not, and cheaper unbranded coils exist for some platforms. Branded coils from the manufacturer carry the benefit of tested resistance, correct wick density and consistent quality, and they are less likely to leak or fail early. For a hardware platform you have already invested in, a branded pack is usually the lower-risk route, and the saving on a cheaper clone is often lost the first time a batch burns out early.

If you vape heavily, it is worth buying two packs at once. The lower delivery cost per head and the guarantee of never running out make it a straightforward saving.

How to fit, prime and use your new Unicoil head

Fitting a replacement coil takes a couple of minutes. Taking the time to prime it properly is what separates a coil that lasts two weeks from one that burns out in two days. Follow this sequence each time.

• Step 1, power down. Switch off the device, or lock it, so it cannot fire while you work. Remove the tank from the battery if it is separable.
• Step 2, empty and open the tank. Pour out any remaining liquid, unscrew or release the base and remove the old head. Check the old head for colour: dark brown or black residue confirms it was finished.
• Step 3, clean the tank. Rinse the tank with warm water, shake out the drops and let it air dry completely, or dry it with a lint-free cloth. Water left behind causes spitting and weak flavour.
• Step 4, soak the new head. Remove the new coil from its pack. Drip a few drops of your e-liquid onto the exposed cotton through the side holes, until it looks evenly dark and damp. Do not flood the central chimney.
• Step 5, seat the head. Push or screw the head into the base until it is firm and level. Do not overtighten.
• Step 6, fill the tank. Fill with liquid up to the maximum line. In the UK, tanks are limited to 2 ml of capacity, so there is no point trying to overfill.
• Step 7, wait. Let the tank stand for five to ten minutes so the cotton fully saturates. This is the step most people skip, and it is the leading cause of dry hits on a new coil.
• Step 8, first puffs. Set the device to the low end of the coil's wattage range. Take three or four gentle puffs without firing the coil, then a few short fired puffs, and raise the power gradually.

Daily use tips:

• Keep the tank at least one third full. Running it nearly dry is the quickest way to burn cotton.
• Pause between long drags to let liquid wick back in.
• If you chain vape, consider a slightly lower wattage than usual.
• Change your coil when flavour dulls, rather than waiting for a burnt taste.

Store spare heads in their original packaging, in a cool, dry drawer. Do not carry loose coils in a pocket with keys or coins, as the housing can be dented and the cotton contaminated.

Troubleshooting: leaks, dry hits, gurgling and resistance errors

Most coil problems have simple causes. Work through the likely ones in order before assuming the pack is faulty.

Dry or burnt taste straight after fitting. The cause is nearly always insufficient priming. Remove the tank, let it rest upright for ten minutes and try again at lower power. If the burnt taste persists on a head that has had a full soak, the wattage is probably above the coil's range.

Weak or fading flavour. This is normal ageing. If the head is more than a couple of weeks old, or you use sweet liquids, replace it. Cleaning the tank thoroughly can also help, since old residue in the chimney dulls taste.

Leaking from the airflow or base. Check the following:

• Is the head fully seated and the base fully tightened?
• Are the silicone seals in place and undamaged?
• Is the tank overfilled, or was it filled while tilted?
• Is the liquid very thin, which flows through the cotton quickly? Consider a thicker VG-heavy mix in a low-resistance head.
• Has the tank been stored on its side or in a warm place, expanding the air inside?

Gurgling or spitting. This usually points to condensation in the chimney, a slightly overfilled tank or moisture left from rinsing. Dry the tank properly and ensure the airflow is not blocked. Spitting can also mean a wick that is too heavily soaked, which settles after a few puffs.

Device shows no atomiser, check coil or short circuit. Remove the head, wipe the contacts on both the coil and the tank with a dry cloth, refit firmly and try again. If a brand-new head still fails, try a second from the pack. A single faulty head can occur, though it is uncommon.

Resistance reads wrongly. A reading far from the printed value usually means a poor connection. Clean the contacts and reseat. Small variations are normal, but large ones are not.

Hot vapour or hot metal. Turn the wattage down immediately. A coil that heats beyond its range is being starved of liquid or overpowered.

If you have followed all of these steps and a head still does not work, contact us with the order details and a short description of the problem. Faulty goods are covered by your rights under UK consumer law, and we would rather resolve it than leave you without a working setup.

How it compares with other coil platforms

The coil market is crowded, and most major brands have at least one mesh-based platform. A fair comparison needs to acknowledge that coils are tied to hardware: you cannot choose a coil in isolation from the tank it fits. That said, if you are choosing between hardware ecosystems, or deciding whether to stay with OXVA or move, it helps to see how the options differ.

Against Vaporesso GTi style mesh coils. Vaporesso's GTi range is widely stocked and has been used across a large number of tanks and kits, so replacement heads are very easy to find and the resistance ladder is broad. OXVA's range is narrower, but heads fit within a defined OXVA family, and users who like OXVA's devices rarely need to look elsewhere.

Against Uwell Caliburn style pod coils. Uwell's Caliburn coils are built around closed pod systems and are known for convenience and very simple handling. They are a good choice for beginners who want something close to plug and play. Unicoil heads tend to suit people who want more control over wattage and who use a refillable tank rather than a sealed pod.

Against Geekvape and Aspire heads. Both brands offer a wide range of coil families, and a few of their heads are known for long life in sub-ohm tanks. They are strong alternatives if you are open to changing hardware. If you already own OXVA hardware, though, they will not fit, and switching platforms means buying a new tank or kit.

Against unbranded or generic replacement coils. These can be cheaper, but quality control varies, and resistance values may drift outside tolerance. For a platform you rely on daily, the manufacturer's own heads are the lower-risk option.

What this means in practice:

• If you own compatible OXVA hardware, buy the OXVA coil. Switching brand is a hardware decision, not a coil decision.
• If you are choosing between ecosystems, compare how widely spare coils are stocked, how many resistance options there are and what the cost per week works out to.
• If you want maximum convenience, a closed pod system beats any refillable tank. If you want control and economy, a coil-based system wins.

Being honest about the competition makes the choice easier. For those already in the OXVA ecosystem, the Unicoil pack is the obvious and sensible consumable. For everyone else, the question to answer is which hardware suits you, and the coil follows from that.

UK rules, delivery and responsible disposal

Vaping products in the UK are regulated, and understanding the rules helps you buy and use them sensibly. A few points are directly relevant to a coil pack and the hardware it supports.

• Age restriction. It is illegal to sell nicotine vaping products to anyone under 18 in the UK, and it is illegal for an adult to buy them on behalf of someone under 18. Age checks apply at purchase and on delivery.
• Nicotine strength. Refillable e-liquid is capped at 20mg/ml, in bottles of up to 10ml.
• Tank size. Refillable tanks and pods are limited to 2 ml of capacity.
• Single-use devices. The sale of disposable vapes was banned across the UK from 1 June 2025. Refillable systems that use replaceable coils, like this one, are one of the routes that remain, and they also create far less waste.
• Delivery. We dispatch to UK addresses, with delivery options and costs shown at checkout. A coil pack is small and light, so it often ships quickly and cheaply, and it is easy to add to a larger order.

On disposal, a used coil is a small piece of metal and cotton with some liquid residue, and it should not be treated as ordinary household waste if a better route is available. The battery in your device is a separate item and is a fire risk if crushed or put in general rubbish or kerbside recycling.

• Do not put vape hardware or batteries in household recycling or general waste bins.
• Take used devices and batteries to a household waste recycling centre, a small electricals recycling point, or a retailer that operates a take-back scheme.
• Used coils can usually be handled in the same way as other small vape waste. Check your local council's guidance on what it accepts.
• Let used liquid residue dry before disposal, and keep coils away from children and pets.

Keep all vaping equipment and e-liquid out of reach of children. Nicotine is addictive, and e-liquid can be harmful if swallowed or if it contacts skin. If you are trying to stop smoking, local stop smoking services in the UK can offer free support alongside vaping, and the combination often improves your chances of success.