IJoy Coil System 0.15 (Pack of 3)

Overview

The IJoy Coil System 0.15 (Pack of 3) by IJoy at 0mg. Free UK delivery over £20, same-day dispatch on weekday orders before 4pm.

Overview of the IJoy Coil System 0.15 Ohm pack of 3

The IJoy Coil System 0.15 (Pack of 3) is a set of three replacement atomiser heads for IJOY sub-ohm tanks that use the IJOY coil system. It is an accessory, not a complete vape. The coil is the small consumable at the base of the tank: cotton draws e-liquid in, a heating element rated at 0.15 ohm vaporises it when you press fire, and the vapour travels up the centre of the tank to the drip tip. When flavour dulls or vapour thins out, you swap the head rather than the whole tank.

At 0.15 ohm this is a low-resistance head, firmly in the sub-ohm bracket. In practice that points to direct-to-lung (DTL) vaping: a long, slow inhale straight into the lungs, rather than holding vapour in your mouth first. It suits vapers who want dense vapour, a warm draw and fuller flavour than a pod kit or a higher-resistance coil will give, and it asks for more power and more e-liquid in return.

A few honest framing points before going further. 0.15 ohm is a demanding resistance, so it needs a device with a sensible wattage ceiling and a battery that can deliver the current safely. It works best with low-strength, high-VG e-liquid. It is a consumable that you will replace regularly. And compatibility with your particular tank is the first thing to check, ahead of price, flavour or anything else on this page.

This guide covers what the pack is, how a 0.15 ohm head behaves, how to prime and look after it, who it suits and who should look elsewhere, and how it compares with other coil options. Where a figure depends on your tank or your device, we say so instead of guessing.

• Product type: replacement coil heads (accessory)
• Pack size: 3 coils
• Resistance: 0.15 ohm (sub-ohm)
• Vaping style: direct-to-lung
• Typical power use: roughly 50W to 100W for heads of this resistance; always follow the range printed on the pack or coil
• Works best with: 0mg to 6mg e-liquid, ideally 70VG/30PG or similar

What is in the pack and which tanks it fits

The pack contains three replacement coil heads, each at 0.15 ohm. There is no tank, battery, charger or e-liquid in the box. For most daily vapers three coils represent somewhere between three and six weeks of use, depending on how much you vape, what you vape and how you look after each head. Heavy users on sweet, thick e-liquids will sit nearer the short end of that range; lighter users on clean, thinner juices nearer the long end.

Compatibility is the single most important check. Coil heads are not universal. Each tank is built around a specific base thread, seating depth and sealing arrangement, and a head from a different system may not seat properly, may leak, or may not fire at all. This pack is intended for IJOY tanks that use the IJOY coil system. Before ordering, look at three things:

• the coil currently in your tank, which usually has its resistance and a series code laser-etched or printed on the metal collar
• the tank name and model on its base or in the original box
• the compatibility information on the product listing for this pack

If the code on your old coil does not match, do not assume a close-looking head will work. A coil that sits slightly proud, or one that screws in loosely, is a common cause of leaking and flooding. If you cannot identify the tank, the quickest route is to photograph the tank and the used coil and check them against the IJOY range before buying.

It is also worth knowing that the same tank often accepts several resistances. If your tank supports other IJOY heads, this 0.15 ohm option sits at the high-power end of the range. Lower-power alternatives usually exist for the same tank, and we cover how to choose between them later in this guide.

Finally, buy from a reputable UK retailer. Counterfeit coils exist in the wider vape market, and they tend to show up as inconsistent resistance, burnt-tasting cotton, or unusual metallic flavours. A sealed pack with intact packaging and a clear batch or authenticity marking is a sensible baseline.

Coil and mesh technology at 0.15 ohm explained

Resistance, measured in ohms, describes how hard the heating element resists the flow of current. A lower resistance lets more current flow, which produces more heat at a given voltage. That is why 0.15 ohm heads are built for high wattage, and why they produce a lot of vapour once up to temperature.

The numbers make this concrete. Power, voltage and current are linked by simple relationships, and a 0.15 ohm coil at typical settings works out like this:

• 60W: about 3.0V across the coil and roughly 20A of current
• 80W: about 3.5V across the coil and roughly 23A of current
• 100W: about 3.9V across the coil and roughly 26A of current

For comparison, a 0.6 ohm coil at 20W sees about the same voltage but only around 6A. The extra current is what makes a 0.15 ohm head physically demanding on a battery, and it is the reason the device and the cells matter as much as the coil itself.

Heads at this resistance are most commonly built either from a mesh sheet or from several strands of wire wound in parallel. Mesh has become the common approach in modern sub-ohm tanks because a flat, perforated sheet of resistance material gives a very large heating surface. That larger surface does two useful things. It heats evenly, which tends to improve flavour consistency, and it spreads the electrical load, which reduces hot spots that can scorch cotton. Check the markings or the listing for this pack to confirm the exact construction, as it is the head design rather than the resistance alone that determines how it feels.

Inside the head, organic cotton sits behind the heating element. E-liquid enters through wicking ports in the coil body and is carried to the element by capillary action. At 0.15 ohm the element can vaporise liquid very quickly, so the cotton and ports have to keep up. This is why high-VG e-liquid, which is thicker, is usually a poor match for a tiny wicking port but a good match for a head with generous openings, and why you should always give a fresh coil time to soak before firing.

The takeaway: a 0.15 ohm head is a high-output component. It rewards a well-matched device, a sensible wattage and patient priming, and it punishes the opposite.

Performance and vapour delivery

The defining characteristic of a 0.15 ohm head is vapour volume. Once the element reaches working temperature, which happens in a fraction of a second on a quality mesh head, each draw produces a thick, warm cloud. Compared with a 0.6 ohm or 0.8 ohm head on the same tank, the difference is obvious: more vapour per second, a longer-feeling draw and a smoother throat hit when the e-liquid is well chosen.

That performance comes with trade-offs worth stating clearly:

• E-liquid use is higher. A typical sub-ohm vaper on a 0.15 ohm head might use anywhere from a few millilitres to well over five millilitres a day, depending on puff length and frequency. A 5ml bottle of e-liquid can disappear faster than you expect.
• Battery drain is faster. Higher wattage means shorter run time per charge. A single high-drain 3000mAh cell at around 80W might give roughly 100 puffs of a few seconds each in practice, and often fewer, so many people carry a spare or use a dual-cell device.
• The coil is more sensitive to errors. Under-priming, chain-vaping without letting the wick recover, or setting the wattage too high will shorten its life.

Ramp-up is where mesh at this resistance earns its keep. A well-built head reaches full vaporisation quickly, so the first second of a draw is not thin or cold. You will notice it most when you stop and start between puffs. If a head takes noticeably longer to warm, check the wattage first, then the prime, before blaming the coil.

Draw resistance depends on your tank airflow settings, not on the coil alone. With the airflow open, a 0.15 ohm setup draws very airy, almost like breathing through a straw. Closing the airflow part way tightens the draw and often improves flavour, at the cost of a slightly warmer vapour. Experiment in small steps rather than jumping from fully open to nearly closed.

Vapour production is also affected by the e-liquid ratio. A 70VG/30PG blend gives the thickest cloud, 50VG/50PG gives a slightly crisper throat hit and better wicking, and very high-VG blends of 80VG or more can struggle to feed a head quickly enough at high power. If you find the coil dry-hitting at sensible wattage, a thinner e-liquid is the first thing to try.

Flavour profile

A coil does not have a flavour of its own, but it does determine how faithfully your e-liquid is reproduced. At 0.15 ohm, flavour behaviour is a balance between two forces: a large heating surface that vaporises liquid evenly, and a high power draw that can wash out delicate notes if the wattage is set too high.

In general terms, expect the following from a well-primed head in the right wattage range:

• Fruit and ice e-liquids come across fuller and juicier than they do in a pod device, with the cooling note carrying through rather than disappearing after the first puff.
• Dessert and bakery profiles do well at the lower end of the head's range, where the vapour is warm instead of hot. Pushed to the top of the range, creamy flavours can turn dry or slightly burnt.
• Tobacco and menthol profiles are reproduced clearly, though a delicate tobacco can taste thin when vaped as a huge cloud. Slightly lower wattage and tighter airflow help.
• Sweeter e-liquids caramelise on the element over time. That is not a defect in the coil, it is chemistry, and it is the most common reason flavour fades before the head wears out.

The first few draws on a new head often taste slightly flat or papery. That is the cotton settling, and it usually clears within the first few millilitres of e-liquid. If it does not, the head may not be fully primed, or the e-liquid may be too thick for the wicking ports.

Flavour drift over the life of the coil is normal. A fresh head typically has its sharpest flavour in the first few days. After that, build-up gradually reduces definition. A common sign that a head is nearly finished is that your usual e-liquid starts to taste muted or faintly burnt even though the tank is full and the wattage has not changed. At that point a new coil resets the experience, which is the main reason people replace heads before they stop working altogether.

Cleaning the tank thoroughly when changing a coil, and sticking to one e-liquid flavour per coil where you can, helps keep each head tasting clean. Switching between very different flavours, such as menthol and a creamy dessert, tends to leave traces behind, particularly in the cotton.

Design and build quality

Coil heads are small, but the construction details decide how they behave. A typical sub-ohm head from IJOY's coil system has a metal collar housing the heating element and cotton, a base with a positive pin and sealing ring, and a row of wicking ports around the sides. Here is what to look for when you open the pack and handle a coil:

• Clean seals. The silicone or rubber ring around the base should be intact and seated evenly. A cut, twisted or missing seal is a cause of leaks.
• Intact cotton. You should see clean, white or natural-coloured cotton through the wicking ports, not scorched brown or loosely hanging fibres.
• Centred pin. The central positive pin should sit in the middle of the base and be free from dirt or glue residue.
• Clear markings. Resistance and any series code should be legible on the collar.

Each coil is a small, precisely assembled part. Unlike a tank or a battery, there is nothing to adjust, and nothing you can fix. If something looks wrong on arrival, do not install it: report it to the retailer, as the Consumer Rights Act 2015 requires goods to be of satisfactory quality.

The wicking ports are the design feature that most affect everyday use. Larger ports let thicker e-liquid flow in faster and suit higher-VG juices; smaller ports restrict flow and can starve the cotton at high wattage. If you notice a head that dry-hits easily with a 70VG e-liquid even when primed, the ports may be too small for that viscosity, and a slightly thinner blend usually solves it.

The packaging is straightforward. Three individual heads are normally supplied in a sealed pack. Keep unused coils in their pack until you need them, away from heat, strong light and damp. A coil that has been stored loose in a bag or pocket can pick up dust or lose its cotton shape.

As a build summary, this is a consumable part, so expect an unfussy design that prioritises a consistent seal, even wicking and a durable collar over anything cosmetic. Nobody will see it once it is in the tank, and that is the right way to judge it: by how it performs, not how it looks.

Power, battery and charging with a 0.15 ohm coil

Because the coil has no battery of its own, power and charging are handled by your device. But the coil dictates what that device has to do, so this section matters.

At 0.15 ohm, current draw is high. From the earlier figures, 80W through a 0.15 ohm head means around 23A through the coil. That current has to come from your battery. A single-cell device pulling 80W from a 3.7V nominal cell can demand a continuous current in the region of 20A or more from the cell, while a dual-cell device that wires cells in series splits the load, bringing it down to roughly half per cell. This is why a dual-cell device is the more comfortable pairing for a head of this resistance.

• Use a device whose power range comfortably covers the head's recommended wattage.
• If your device takes removable cells, use genuine high-drain cells from a reputable maker, and make sure their continuous discharge rating is comfortably above what the device will draw.
• Do not mix old and new cells, or cells of different brands or capacities, in the same device.
• Never use cells with torn wrappers.

Charging. Charge according to your device's manual, using the cable and a standard USB charger of suitable rating. Do not leave a charging device unattended or on a soft surface such as a bed or sofa, and stop using any battery that swells, gets unusually hot, or has a damaged wrap. Removable cells are best charged in a dedicated external charger. Never carry loose cells in a pocket with coins or keys; use a plastic cell case.

Run time. As a rough guide, a 3000mAh cell stores about 11 watt-hours. At 80W, that is about eight minutes of continuous firing in theory, or around 100 puffs of roughly four seconds, less in practice once efficiency losses are included. Most people on a 0.15 ohm head recharge once a day, or use two cells. A tank that is regularly firing at the top end of its wattage range will drain faster than one set a notch lower.

Ohm checks. If your device shows a resistance reading, a new 0.15 ohm head should display a figure close to that value, plus or minus a few hundredths of an ohm. A reading very different from the rated resistance suggests the coil is not seated correctly, or that the pack contains a faulty unit.

Nicotine strength and e-liquid guidance for UK vapers

A 0.15 ohm head produces a lot of vapour per draw, and that changes the nicotine equation. Taking in a large volume of vapour with each long inhale means taking in a lot of nicotine at any given strength. This is why sub-ohm e-liquids are traditionally sold at low strengths.

As a general guide, adults using a 0.15 ohm head usually choose:

• 0mg for those who no longer want nicotine, or who use the coil mainly for flavour and clouds.
• 3mg as the common starting point for former smokers who still want a mild throat hit.
• 6mg for those stepping down from a higher-strength pod device who find 3mg unsatisfying.

Strengths of 12mg or higher are rarely sensible with a head of this output. They can be harsh, and delivering that much nicotine in a large cloud is both unpleasant and more than most people need. High-strength nicotine salt e-liquids in particular are designed for low-wattage pod devices and are not suited to sub-ohm use at high power.

UK rules to keep in mind. In the UK, nicotine-containing e-liquid and pod products are limited to a maximum of 20mg/ml, and refill bottles are limited to 10ml. Tank capacity on products sold as nicotine devices is limited to 2ml. This is why you will see 10ml bottles, 2ml tanks and 20mg as the highest strength across the market. The 20mg limit is a ceiling for the legal market, not a recommendation for a 0.15 ohm coil. Single-use disposable vapes were also banned from sale in the UK from 1 June 2025, so refillable systems like this one are the route most UK adults who vape now use.

E-liquid ratio. Choose a high-VG blend, around 70VG/30PG, for the thickest vapour and smoothest feel. Choose 50VG/50PG if you prefer a crisper throat hit or find thicker e-liquid struggles to wick. Avoid very thin, high-PG juices intended for mouth-to-lung devices, as they can flood and leak in a high-airflow tank.

Always buy from a UK retailer who verifies age. Nicotine products are for adults only and cannot be sold to anyone under 18.

Who the IJoy 0.15 ohm coil is for, and who should skip it

Not every vaper wants or needs a 0.15 ohm head. It is a specific tool for a specific style, and the clearest way to decide is to ask what you want from your device.

This pack is a good fit if you:

• already own an IJOY tank that uses this coil system, and want a spare set
• vape direct-to-lung and want dense, warm vapour
• use a device with enough power and a battery that can handle the current
• vape low-strength e-liquid, typically 0mg to 6mg
• are comfortable with regular maintenance, including re-priming and cleaning
• want a pack of three so that coil changes do not interrupt your routine

You should look elsewhere if you:

• prefer a tight, cigarette-like mouth-to-lung draw, where a 0.6 ohm to 1.0 ohm head or a pod system is more appropriate
• use a low-wattage pod kit that does not support sub-ohm use, as the device will not run this head properly
• vape 10mg or 20mg nic salts, which are not designed for a 0.15 ohm coil
• are new to vaping and want the simplest possible setup. A simple pod kit or a higher-resistance tank is easier to live with
• are unsure that your tank is compatible. Check first, buy second

Newer vapers. A typical path for people moving off cigarettes begins with a pod device and a nic salt. Some then move to sub-ohm because they want bigger clouds or a different feel. If you are making that move, start at the lower end of the head's wattage range, with 3mg e-liquid, and increase gradually. It is easier to turn power up than to recover from an uncomfortable first session.

Non-smokers. Vaping is intended for adults who smoke and want an alternative. If you do not smoke, there is no health benefit to starting, and a high-output setup like this is not for you.

How to install, prime and use the coil

Proper preparation makes the biggest difference to how long a coil lasts and how it tastes. Follow these steps for a clean install.

• Switch the device off and empty the tank. Remove the tank from the battery and take it apart according to the manufacturer's instructions.
• Remove the old coil. Unscrew it, and rinse the tank base in warm water. Let it dry fully, using a clean cloth or leaving it to air dry. Moisture left in the base can cause spitting on the first draws.
• Check the new coil. Look at the seal, the pin and the cotton as described earlier. Do not touch the cotton with your fingers more than you need to.
• Prime the coil. Drip a few drops of e-liquid directly into each wicking port, and a few more onto the cotton from the top, until the cotton looks evenly dark. Do not skip this step; it prevents dry hits.
• Screw the coil in snugly. Hand-tight is enough. Over-tightening can damage the seal.
• Fill the tank. Fill to the recommended level, avoiding the central airflow tube. Then close the filling port.
• Wait. Leave the tank upright for five to ten minutes. This lets the cotton fully saturate. It is the single most useful habit for coil longevity.
• Start low. Set the wattage at the lower end of the range printed on the coil, take a couple of gentle draws without firing, then take short test puffs. Increase the wattage in small steps until flavour and warmth feel right.

Everyday use tips.

• Take slow, even draws of two to four seconds rather than very long pulls, so that the cotton can re-wet between puffs.
• Pause between puffs when chain vaping. Back-to-back draws can outpace the wicking.
• Keep the tank at least a third full. Running it nearly empty exposes dry cotton.
• Do not fire the device without liquid in the tank. This dry-burns the cotton and ruins the coil.
• Do not press the fire button when the tank is off the device, and do not fire an unprimed coil.

Take care when handling anything that has been fired recently: a coil can be hot enough to burn skin after extended use.

Troubleshooting, coil lifespan and disposal

Even a well-matched head can run into problems. Most issues have a simple cause.

• Dry or burnt taste. Usually under-priming, very low e-liquid level, or wattage set too high. Add liquid, wait five minutes, drop the wattage by five or ten watts and test again. If the burnt taste continues, the cotton is probably scorched and the head should be replaced.
• Gurgling or spitting. Often caused by condensation or a flooded coil. Blow gently through the drip tip with the tank upright to clear the airflow, and wipe the base.
• Leaking. Check that the coil is the correct one for your tank, that the seal is intact, and that the tank is assembled correctly. Overfilling and thin e-liquids are also common causes.
• Weak vapour or poor flavour. Check that the coil is screwed in properly, the airflow is not blocked, and the e-liquid is not too thick. If none of these helps, the coil is probably at the end of its life.
• Device shows an error such as no atomiser or check atomiser. Remove the tank, clean the contacts, and reseat the coil. If the error stays, the coil may be faulty.
• Resistance reads wrong. Reseat the coil and check the connection between the tank and device. If it still does not read close to 0.15 ohm, stop using the coil.

How long does a coil last? Expect around one to two weeks per head for typical daily use, with a lot of variation. Factors that shorten life include sweet e-liquids, high wattage, chain vaping and dry-burning. Factors that extend it include thoroughly priming, lower wattage, thinner e-liquids and letting the wick rest.

When to replace. Replace the coil when flavour turns consistently muted or burnt, when vapour thins even at a good wattage, or when the e-liquid begins to taste harsh. Replacing early is cheaper than persevering with a poor head, and a tired coil can encourage bad habits such as turning the power up to compensate.

Disposal and recycling. Spent coil heads contain small amounts of metal and cotton and should not go in with ordinary household waste where local guidance says otherwise. Many UK retailers that sell vaping products offer take-back points for waste vaping equipment, and household waste recycling centres typically accept vapes, batteries and small electricals. Check your local council for the current arrangements. Never throw batteries in general bins, as damaged cells are a fire risk in waste vehicles and recycling plants.

Value for money and how it compares with other coils

Coil heads are a running cost, so value is worth thinking about properly. The relevant measure is not the pack price on its own, but the cost per week of use, and how that compares with the performance you get.

A pack of three works out cheaper per coil than buying heads singly, and it gives you spares so you can change a coil as soon as flavour fades rather than putting it off. If a coil lasts one to two weeks, a pack of three covers roughly three to six weeks of vaping. Check the current price on the product listing and divide it by the number of weeks you expect it to last, which gives a realistic cost per week to compare against alternatives.

How it compares with other options.

• Against higher-resistance IJOY heads (for the same tank). A 0.15 ohm head gives more vapour and a bigger draw but uses more e-liquid and power. If your tank also takes a higher-resistance head, that option will last longer on a charge and a bottle, and it will be gentler on a single-cell battery.
• Against other brands' 0.15 ohm mesh heads. Several brands sell 0.15 ohm mesh heads for their own tanks, including the Freemax 904L M-series. They offer broadly similar performance in principle, but coil heads are not interchangeable between systems, so the decision usually comes down to the tank you already own rather than the coil on its own merits.
• Against pod systems. Replacement pods or cartridges for a pod kit are typically simpler and use far less power, with a tighter draw and lower e-liquid consumption. They produce less vapour and a less intense flavour, but suit people who want convenience.
• Against disposable vapes. Single-use disposables are no longer sold legally in the UK, and a refillable system with replaceable coils generates less waste and gives you a choice of e-liquid and strength.
• Against rebuilding your own coils. Rebuildable atomisers can be cheaper per coil in the long run, but need skill, tools and knowledge of Ohm's law. For most people, a pre-made head is more consistent and safer.

Honest summary. This pack represents reasonable value if you already own a compatible IJOY tank and you vape direct-to-lung at moderate wattage. It is not the right purchase for someone who wants a low-effort or low-power setup, and it makes little sense if you are unsure of compatibility. Buy it because it matches your tank and your vaping style, not because of the number on the front of the pack.