Perfect strength for me
Honestly, I was unsure at first but this has been great. Flavour is strong and lasts the full session. No complaints at all.
Geek VapeThe Geek Vape Z Series Coil 5pcs/pack Z 0.4ohm XM (Boost Version) by Geek Vape in Z 0.4ohm XM (Boost Version) at 0mg. Free UK delivery over £20, same-day dispatch on weekday orders before 4pm.
The Geek Vape Z Series Coil is a replacement atomiser head sold here as a pack of five. It is made for Geek Vape tanks in the Z family. In any vape tank the coil is the part that does the real work. It holds cotton against a heating element, pulls e-liquid in by capillary action and turns that liquid into vapour when you inhale or press the fire button. Flavour, throat feel, how warm the vapour is, how often the tank leaks and how long a refill lasts all depend far more on the coil than on the glass or the metalwork around it. That is why keeping a spare pack in the drawer matters more than it first sounds.
This listing is a five-piece multipack, so you receive five separate coil heads in one order instead of paying a single-coil price each time one burns out. The Z Series range has four variants in this product family. In a range like this the variants usually differ in resistance and in the wattage window the coil is designed to work in, not in flavour, because a coil has no flavour of its own. Use the selector on the product page to see which options are in stock, and read the compatibility and wattage sections below before you choose.
The key facts at a glance:
It is worth being straightforward about what this product is. A coil is a consumable. It will not make a poor tank good, and it will not rescue a flat battery or the wrong e-liquid. What it does is restore the performance your tank had on day one. If your vapour has gone muted, your flavour has gone flat or you are tasting something scorched, a fresh coil is almost always the first and cheapest fix. Buying in fives also takes the guesswork out of when to change: swap early, before the taste turns, and you will get a more consistent experience from your device throughout the life of the tank.
The rest of this guide covers compatibility, construction, performance, flavour, build, power and battery considerations, nicotine strength, fitting, troubleshooting, who the coils suit and how they compare on value with the main alternatives available to UK vapers.
Coil compatibility is the single most common reason a replacement order goes wrong, so it is worth slowing down here. Geek Vape builds several coil families and each is designed around a specific tank base. The Z Series coils are intended for tanks in Geek Vape's Z family and for the kits that bundle those tanks. Geek Vape has listed Z coils against tanks such as the Z Nano 2 and the Z Sub-Ohm tank range, but model lists change over time, so always confirm against the manual, the box or the maker's own compatibility chart for your exact tank.
Do not assume that a coil which looks similar will fit. Geek Vape's B Series, G Series and other coil families, and the coils from other brands, are not interchangeable with Z heads even where the outer size looks close. A coil that does not seat correctly can leak around the base, give a loose or rattling feel, trigger a short circuit warning on the device or in the worst case sit badly enough to cause poor electrical contact.
A quick compatibility check before you buy:
It also helps to understand how the four variants in this family differ from one another. Typically a lower resistance coil asks for more power, produces more vapour and warmer output and uses more e-liquid, while a higher resistance coil in the sub-ohm class is gentler, uses less liquid and runs happily at lower wattage. Whichever you pick, use the wattage range printed on the coil as your guide rather than guessing from the device screen.
One UK-specific point: tanks sold for the UK market are limited to 2ml of capacity by regulation, and nicotine e-liquid bottles are limited to 10ml. That affects how often you refill, not which coil fits, but it does mean a UK-edition tank will need topping up more often than the capacity figures you may see in overseas marketing. If you vape a lot of e-liquid through a low-resistance coil, expect to refill several times a day and consider carrying a spare bottle.
Z Series coils are mesh-style sub-ohm heads. To see why that matters, it helps to compare mesh with the older round-wire design. A traditional coil is a length of resistance wire wound into a spiral around a cotton wick. It heats along a relatively small surface. A mesh coil replaces the wire spiral with a flat or rolled sheet of fine woven metal that sits against the cotton. Because the sheet has far more surface area touching the wick, it heats a larger amount of e-liquid at the same moment and does so more evenly.
In practice that gives three advantages that vapers notice straight away:
Resistance is measured in ohms, and a sub-ohm coil is any head below one ohm. Lower resistance means the device pushes more current through the element for a given voltage, so the coil produces more heat and more vapour at the same setting. This follows basic electrics: power equals voltage squared divided by resistance. A regulated device does the sums for you and holds the wattage you set, which is why the printed wattage range on a coil is more useful than the resistance figure alone.
Most mesh coils in this class use a stainless-steel or Kanthal-type alloy, and the wicking is cotton, often an organic cotton blend. If you use a device with a temperature control mode, check the coil's material marking before you switch to temperature control, because only certain alloys are suitable. If the packaging does not say the coil supports temperature control, run it in standard wattage mode.
The coil head is also a sealed unit. The mesh, cotton and outer casing are assembled at the factory and are not designed to be rewrapped or reused. Do not try to clean and reuse a coil that has burnt, because charred cotton and carbonised e-liquid cannot be reliably removed and the performance will not return. Fit a fresh head instead. With five in the pack you will always have the next one ready.
Finally, remember that coil technology is only part of the picture. A good coil in a tank with poorly set airflow, or a heavy-sweetened liquid that gunks the mesh quickly, will still disappoint. The sections below cover how to get the best results from the construction rather than fighting it.
Because a coil is not a self-contained device, there is no official puff count printed on the pack the way there is on a disposable. A more useful way to think about performance is in three parts: how the vapour feels, how quickly the coil responds and how long it lasts before it needs replacing.
Vapour feel. Z Series coils are sub-ohm, which means a direct-to-lung style of inhale. You draw the vapour straight into your lungs in one steady, relaxed pull, with the airflow ring set fairly open. The result is a large, warm cloud with a full body. If you are used to a tight mouth-to-lung draw from a pod kit or a former disposable, expect it to feel airier and more intense. Close the airflow slightly if it feels too loose, or lower the wattage a few steps.
Response. Thanks to the mesh surface, the coil reaches temperature quickly. There is little of the lag that older single-wire builds had. A good starting method is to set the wattage at the lower end of the printed range, take a few puffs and then raise it two or three watts at a time until the vapour feels warm rather than hot. Going to the top of the range is rarely necessary and shortens coil life.
Lifespan. This is where honest expectations matter. As a rough working estimate, a Z Series coil lasts around one to two weeks for a moderate user, which for many people equates to several thousand puffs. That is an estimate rather than a rated specification. Heavy daily use, high wattage and sweet liquids with a lot of sweetener or dessert flavouring will reduce it. Clean, fruit-forward or tobacco liquids at moderate wattage will extend it. A five-pack therefore supplies somewhere in the region of five to ten weeks of vaping for a typical user.
Signs a coil is approaching the end of its life:
Liquid consumption is also part of performance. Low-resistance coils use a fair amount of e-liquid, commonly a few millilitres a day for regular use. If you notice you are going through a 10ml bottle too quickly, drop the wattage, close the airflow a little or move up one resistance step if your pack offers it. Efficiency and enjoyment are usually found a few watts below the maximum.
A coil has no flavour of its own, but it shapes how flavour arrives. Mesh heads in this class are known for rendering e-liquids with clarity, because the even heat avoids the cooked, burnt-sugar notes a hot spot can add. On a fruit liquid you tend to get distinct top notes, on a menthol or ice blend you get a clean cooling effect without a harsh edge, and on a tobacco or custard liquid you get a rounded base note that doesn't turn bitter early. This is a general characteristic of the technology and it does depend on how you power and prime the coil.
Wattage has a clear influence on flavour:
Break-in, or conditioning, is the first stage in a new coil's life. A fresh coil can taste slightly of cotton or packaging for the first handful of puffs, and a new mesh can also give a mild metallic edge. This should fade within the first tank. To condition a coil properly, saturate it before use (see the fitting section), rest it for several minutes and then take your first puffs at low wattage without firing for long periods. Skipping the rest and taking long, hot pulls is how most people burn a new coil on day one.
Flavour fade is a normal part of the cycle. Over the lifespan of the coil the cotton gradually picks up residue from sweeteners and colouring in the liquid. If you swap between flavours often, the first few puffs after a swap can carry a ghost of the last liquid. Rinse the tank, wipe the base and expect a short lag. If you want to keep one liquid very pure, you can dedicate a coil to a single flavour family, for example one coil for fruit and ice and another for tobacco or dessert, and change tanks or coils accordingly. With a five-pack that is an affordable approach.
Finally, a note on e-liquids that work best. Higher-VG liquids at a 70 to 80 percent VG ratio tend to give thicker vapour and smooth throat feel but wick a little more slowly, so make sure the mesh is fully primed. Higher-PG liquids carry flavour sharply and wick fast but can feel thinner. A balanced 50/50 or 60/40 VG/PG blend is a safe starting point for most tanks in this range.
The physical build of a coil head is mostly invisible once it is in the tank, but a few details separate a well-made one from a frustrating one. Take a look at them when you open the pack.
The seal and O-rings. Each Z coil has a seal at the base that stops e-liquid bypassing the wick and leaking into the airflow path or the battery connection. The rubber or silicone sealing ring should be intact, seated evenly and free from nicks. If any ring is cut or twisted, do not use that coil. Contact us and we will sort a replacement.
The contact pin. At the bottom of the coil is the electrical contact that touches the 510 connector pin in the tank base. It should be clean and bright. A bent or dirty contact can cause a misread resistance or a Check Atomizer message on the device.
The wicking holes. These small openings on the side of the coil let e-liquid reach the cotton. They should be clear and the cotton behind them should look white or off-white and slightly fluffy. If they are blocked, glued with residue or the cotton looks pressed flat, treat the coil as defective.
The casing and thread or push fit. Depending on the tank, a Z coil either screws into the base or presses into it. Look at the old coil you are removing and fit the new one in the same way. It should seat firmly with no wobble. Overtightening is a common mistake and can distort the seal, so snug is enough.
What to check before you fit it:
Counterfeit coils exist across the whole vape market, particularly for popular brands, and they can have poor wicking, mislabelled resistance and unreliable materials. The simplest protection is to buy from an established UK retailer rather than from an unknown marketplace seller. Many Geek Vape retail packs carry a security code or QR label that can be checked against the maker's verification page, so look for that on your packaging and use it if present.
Store spare coils in a cool, dry place away from direct heat, in their original packaging, and keep them out of reach of children. A sealed pack stored properly will stay in good condition for a long time, although you should aim to use a pack within a year or two of purchase.
A coil does not have a battery, but it has a direct effect on how your battery performs, so it belongs in any honest discussion of the product. The lower the resistance, the more power the device needs to deliver to hit the wattage you have set, and the faster the battery drains.
As a rough guide, a regulated device running at 60 watts from a single 18650-style cell is drawing in the region of 16 to 17 amps from the battery once you account for the 3.7 volt nominal cell voltage, and more when efficiency losses are included. A two-cell device shares that load across both batteries in series and draws roughly half the current from each. This is why the battery matters so much with sub-ohm coils.
It is also worth knowing that most modern regulated devices include protections against short circuits, low resistance and over-discharge, but those are a backstop and not a licence to ignore the rating of the battery. If your device shows a short circuit or Check Atomizer message after fitting a new coil, stop and read the troubleshooting section before pressing fire again.
To get more out of each charge, a few simple adjustments help. Lower the wattage a few steps from the maximum, keep the airflow slightly tighter, take shorter pulls and avoid chain vaping at the top of the range. You will usually lose very little vapour quality and gain a meaningful amount of battery life and coil life.
Recycling. Spent coils are small and made of mixed materials, so they should not go in with household recycling. The coil heads, any cut-open packaging and old batteries should be taken to an appropriate drop-off point. Many UK supermarkets, vape shops and local council recycling centres have collection points for small electrical items and batteries, and stores that sell vaping equipment are required to offer a take-back service for waste electricals. Never put lithium batteries in general waste or ordinary recycling bins, as they are a fire risk in refuse vehicles and processing plants.
Choosing nicotine strength correctly makes the difference between a satisfying session and an unpleasant one, and it is especially important with sub-ohm coils because of how much vapour they deliver in a single draw.
In the UK, nicotine e-liquid is capped at 20mg per ml, and bottles are limited to 10ml. That cap is the same limit that applied to the pods and cartridges used in refillable pod kits and in the single-use vapes that were sold before the ban on disposables in Great Britain took effect on 1 June 2025. The legal ceiling, however, is not a recommendation. A strength that suits a small pod device can be far too strong for a sub-ohm tank.
A practical guide:
The reason is simple. A sub-ohm coil can deliver several times more vapour per puff than a small pod, so a given strength delivers far more nicotine per puff. If you move from a 20mg pod to a sub-ohm tank at the same strength, you may feel lightheaded, nauseous or throat-sore quickly. Step down significantly and adjust slowly. If you find you are chain vaping to satisfy a craving, move up one step in strength rather than increasing the wattage.
On the e-liquid itself, a 50/50 to 70/30 VG/PG blend tends to suit most tanks of this type. Very thick, high-VG liquids (over 80 percent VG) can wick slowly through the cotton and lead to dry hits if the coil is not fully primed or the wattage is too high. Avoid very thin, very high-PG liquids if your tank has wide airflow and you are prone to leaks. Liquids with heavy sweeteners will shorten coil life, which is worth knowing when you compare costs.
Vaping products are for adults and for smokers looking to switch. If you do not smoke, you do not need to start, and nicotine is addictive. You must be 18 or over to buy from us and we operate age checks on delivery.
Fitting a coil takes a couple of minutes and the way you do it decides whether the coil lasts a fortnight or burns out on day one. Follow these steps in order.
Day-to-day use is straightforward. Keep the tank at least a third full so the wicking holes are always covered. Do not chain vape for long periods because the cotton needs time to re-wet between puffs. Hold the tank upright when not in use and, where the device has a lock, use it when you carry it in a bag or pocket to avoid accidental firing.
Maintenance is minimal. Rinse the tank with warm water and let it dry fully when you change flavour, and wipe the base and the connection pin periodically. Change the coil as soon as flavour degrades rather than pushing it to failure. Used coils and any old battery should be taken to a recycling drop-off point instead of general waste.
Finally, keep your e-liquid and spare coils away from children and pets. Nicotine e-liquid is hazardous if swallowed or if it contacts skin, so wash any spills off immediately and store bottles in a safe place.
Most coil problems come down to a short list of causes. Work through the symptom, check the likely cause and apply the simple fix before you assume a coil is faulty.
A final tip: if every new coil you fit burns within a day, the fault is usually not the coils. Look at your wattage, the sweetener load in your liquid, how long you leave between filling and vaping and how you take each puff. Change one thing at a time and you will find it quickly.
If you receive a coil that is clearly defective on arrival, for example with a cut seal or a damaged contact, keep the packaging and get in touch. Faulty goods are covered under your statutory rights, and we will arrange a replacement or refund.
These coils are a good fit for a specific kind of vaper. Being honest about that saves you money and frustration.
They suit you if:
You should look elsewhere if:
A word about first-time buyers. If you are new to vaping, a sub-ohm Z family kit can feel a lot for a first device. Many people begin with a simpler mouth-to-lung pod system and move to a sub-ohm tank later, once they know their preferred nicotine strength and draw. If you are moving between the two, remember to reduce nicotine strength when you step up to sub-ohm coils.
For experienced users the appeal is practical. If your Z family tank is working well for you, staying with the matching coils avoids compatibility problems and keeps your flavour consistent. Choosing the variant that matches your usual wattage and liquid takes the guesswork out of each reorder, and the five-piece pack means you can buy once and stay supplied for around two months.
Finally, because you use these coils with e-liquid, always check the local rules where you vape, including public transport and workplaces, and keep devices and bottles out of the reach of children. You must be 18 or over to purchase.
Value with a consumable is about cost per week of good vaping, not the sticker price alone. A five-piece pack spreads the cost across five coils, so the per-coil price is lower than buying heads one at a time, and you avoid paying postage repeatedly. Check the current pack price on the listing and divide it by five. If a coil lasts a week to ten days, that gives you a simple weekly cost to set against the price of disposables or pod cartridges you may have used before.
Compared with the options you may have been using:
It is fair to compare the Z Series with the main alternatives from other brands. Be aware that these are different ecosystems and you cannot mix their coils with Geek Vape tanks.
The honest conclusion is that mesh coils from the main brands perform within a similar band, and the differences are modest. The best reason to choose Z Series coils is that you already own a compatible Geek Vape tank and want matching heads that fit properly. The weakness is the one all proprietary coils share: you are tied to the maker's ecosystem and prices, so check availability before you commit to a device.
To keep your running costs down regardless of brand, buy multipacks, change coils on schedule instead of waiting for failure, avoid very sweet liquids if you want longer life, and keep your wattage in the lower half of the printed range. Delivery in the UK is available at checkout, and for any question on stock or variants you can contact us before ordering.
| Brand | Geek Vape |
|---|---|
| Product type | Vape Accessory |
| Nicotine strength | 0mg |
| Available flavours | 1 (Z 0.4ohm XM (Boost Version)) |
| Price | £7.15 |
| Availability | In stock — same-day dispatch |
| Compliance | UK TPD-compliant, MHRA-registered |
Geek Vape is best known for its waterproof, shock-resistant Aegis hardware — chosen by vapers who need a device that survives rough use.
Most people use 0mg to 6mg freebase nicotine in a higher-VG liquid, because sub-ohm coils deliver a large amount of vapour per puff. High-strength nic salts in the 10mg to 20mg range suit low-power pod devices and tend to be too harsh in a low-resistance coil. The UK cap is 20mg per ml, but that is a limit rather than a recommendation.
No, the coil has no battery of its own. It does affect your device, because low-resistance coils draw more power and drain the battery faster. Charge your device with the cable supplied, on a hard surface, and do not leave it charging unattended.
No. A coil has no flavour, and the four variants in this family differ mainly in resistance and the recommended wattage range. Choose the one that matches your previous coil or the wattage you prefer, and pick your flavour through the e-liquid you put in the tank.
A typical coil lasts one to two weeks for a moderate user, though sweet liquids and high wattage will shorten that. That is an estimate rather than a rated figure. A pack of five therefore gives roughly five to ten weeks of use.
A multipack lowers the cost per coil and saves repeat delivery charges, so it is usually the cheaper way to stay supplied. Divide the pack price by five and compare it with the weekly cost of pods or your previous setup. Changing coils on schedule also avoids wasting liquid on a failing head.
They are made for Geek Vape tanks in the Z family, so look for the Z marking on your old coil and check the tank base or manual. If your coil is from a different series, such as B or G, it will not fit. Send us your tank model if you are unsure and we will advise before you order.
They suit adult smokers and vapers who own a compatible Z family tank and enjoy a direct-to-lung draw on lower nicotine strengths. They are not right for anyone without a compatible tank, for people who want a tight cigarette-like draw with 20mg nic salt, or for non-smokers. You must be 18 or over to buy.
Yes, we deliver to UK addresses, and the delivery options, costs and estimated times are shown at checkout. Orders are age-checked and you must be 18 or over to receive them. See our delivery page for the latest details.
Keep the packaging and contact us as soon as you notice a faulty or damaged coil, and we will arrange a replacement or refund under your statutory rights. For safety and hygiene reasons, opened or used coils are generally not returnable unless faulty. Check our returns policy for the full terms.
Do not put coils or lithium batteries in household waste or general recycling. Take them to a recycling drop-off point, such as a supermarket battery bin, a council recycling centre or a store that offers electrical take-back.
Royal Mail Tracked 24 (Next-Day): £1.99, FREE on orders over £20.
DPD Next Working Day: £3.99 (£2.99 over £20), FREE over £100.
Same-day dispatch on orders placed before 4pm Mon-Fri. See our delivery page for full details.
Honestly, I was unsure at first but this has been great. Flavour is strong and lasts the full session. No complaints at all.
Excellent all round. Will absolutely be ordering again. Customer service was helpful too.
Can't fault it. Quality is there, flavour is there, delivery was quick. What more could you want.
Picked this up on the multibuy deal and I'm stocked up for a while. Flavours are all on point.
Great product for the price point. Works exactly as advertised. No surprises, just a solid vape.
Not too strong, not too mild — just right. Good for all day use without being overpowering.
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