Innokin Enduara T18E Tank 4

Overview

The Innokin Enduara T18E Tank 4 by Innokin in 4 at 0mg. Free UK delivery over £20, same-day dispatch on weekday orders before 4pm.

Innokin Enduara T18E Tank: what it is and what it is not

The Innokin Enduara T18E Tank is a refillable tank designed for the slim, mouth-to-lung (MTL) vape kits in Innokin's Endura T18E family. It is sold here as an accessory, which matters before you add it to your basket: this is the tank only. There is no battery in the box, no e-liquid, and nothing will happen until you screw it onto a compatible battery and fill it with your own liquid. If you are after something you can unbox and use straight away, this is not that product. If you already own a T18E-style battery and want a spare, a replacement for a cracked tank, or a way to run a second flavour without flushing your first, it is exactly the sort of part you are looking for.

You may notice the range spelled Endura on Innokin's own packaging and on other retailers' sites, while this listing uses the Enduara spelling. It is the same family of products. The listing title also ends with the number 10, which appears to be a catalogue variant or pack marker rather than a model change, so check the option selector and the product images on the page before you order to confirm exactly what is being supplied.

The tank follows the same design philosophy as the rest of the T18E line: small, light, simple, and aimed at people who want a tight, cigarette-like draw rather than a cloud-chasing setup. It is a good fit for new vapers moving away from smoking, for ex-disposable users who need a refillable alternative now that single-use vapes can no longer be sold in the UK, and for anyone who has outgrown a closed pod system and wants to choose their own e-liquid.

In the sections below we go through the specifications, how it performs, what to expect from flavour, how it is built, what you need for power, the coil and wicking design, nicotine strength guidance, who it suits, how to use it, how to fix common problems, and how it stacks up on value against rival tanks. Where a detail varies between production batches or bundles, we say so rather than guess.

Key specifications at a glance

Technical sheets for vape accessories are often vague, so here is what we can say with reasonable confidence for a tank in this family, along with the points you should double-check against the images and description on the product page.

• Type: refillable MTL tank with a replaceable coil head. It is built for tight draws, not for direct-to-lung inhaling.
• E-liquid capacity: 2ml. This is the maximum tank size UK rules allow for nicotine vaping products, so you will not find a larger legal tank of this type sold in the UK.
• Coil: Prism-series replacement coil heads, typically around 1.5 ohm for the MTL draw. The resistance is printed on the coil base, so always read it before you fit one.
• Connection: a standard 510 thread, which is the common screw fitting used on most batteries and mods. That is why the tank can usually be paired with batteries from other brands, though you should confirm the thread depth and diameter match.
• Filling: filling is done through the top of the tank on designs in this family, by sliding or unscrewing the top assembly. Check the product images for the exact mechanism on the version supplied.
• Airflow: set at the base of the tank. Depending on the version, this is either a fixed slot or a small adjustable ring.
• Body material: metal fittings with a transparent window so you can see your remaining liquid.
• Battery: not included. A tank has no power source of its own.

On puff count, you will not see a figure quoted for a tank in the way you would for a disposable, because the number of puffs depends entirely on the liquid, the coil and how you vape. As a practical rule of thumb, a 2ml fill at a modest MTL setting gives most users somewhere in the region of 300 to 500 draws, depending on how long each draw is. A fresh 1.5 ohm coil commonly lasts one to three weeks of regular use before the flavour starts to flatten, though sweet liquids shorten that and clean, simple flavours lengthen it.

None of those numbers are laboratory figures, and anyone who quotes you a precise puff count for a refillable tank is estimating. Treat them as planning guides rather than promises.

Performance and vapour delivery

The first thing to understand about the Enduara T18E Tank is that it is tuned for restraint. A 1.5 ohm coil on a low-power battery produces a modest amount of vapour with a draw that feels close to a cigarette: resistance on the inhale, a gentle hit in the throat, and a small, quickly dispersing cloud. If you have been used to a big sub-ohm tank, the first few draws will feel restricted. That is the design, not a fault.

In practical terms, performance breaks down like this. Throat hit is moderate to firm when you use a nicotine salt liquid and softer when you use a freebase liquid at a low strength. Vapour volume is small to moderate, enough to feel satisfying without drawing attention in a shared space. Warm-up is fast: a fine, low-resistance coil of this type is generally up to temperature in under a second, so there is little of the delay you might remember from older clearomisers.

Consistency is where a well-made MTL tank earns its keep. Because the coil is small and the liquid chamber holds only 2ml, the wick rarely has far to travel, and the tank tends to deliver a steady experience from the first draw to the last millilitre. You may notice a slight drop in vapour as the liquid level falls below the coil's inlet holes, which is normal on any tank and is your signal to top up rather than keep pulling on a nearly dry wick.

One limitation worth being direct about: if you like warm, dense clouds, this is the wrong tool. Increasing power on the battery will not turn a 1.5 ohm MTL coil into a sub-ohm setup. Pushing it harder mostly shortens the life of the coil and makes the liquid taste hot and slightly burnt. Run it within the range printed on the coil and the performance stays pleasant for the whole life of the coil.

For ex-smokers, the draw characteristics are the main selling point. The tighter airflow means you can inhale slowly into your mouth first, hold for a moment, then draw into the lungs, in a pattern that matches how most people smoke. For people who prefer a direct inhale straight into the lungs, a different style of tank is a better match.

Flavour profile

Flavour on a small MTL coil is typically focused and slightly concentrated rather than airy. Because less liquid is vaporised per draw and the air is not diluted by a wide-open flow, individual flavour notes tend to come through cleanly. Fruit liquids read as juicy but not overwhelming, menthol stays crisp rather than harsh, and tobacco and dessert profiles show their main character without the vapour becoming syrupy.

The coil material and its wicking cotton are the biggest influence on how the tank tastes. Fresh Prism-style coil heads usually deliver their cleanest flavour after the first priming and break-in period, covered in the how-to-use section below. Expect the first two or three days to be the sharpest, followed by a long, stable plateau, and then a gradual fade as the cotton gets saturated with sweeteners and residue. When the flavour dulls and you find yourself blaming the liquid, the coil is almost always the cause, and swapping it restores the original taste.

Some practical flavour pointers for this kind of tank:

• Fruits and sweets: work well, but they gunk up the coil faster. Plan for a shorter coil life if you vape dessert or candy liquids all day.
• Menthol and ice: come through clearly and stay refreshing at 1.5 ohm without the harshness that very high power can cause.
• Tobacco: a good match for the tank's cigarette-like draw, particularly in nicotine salts at 10mg to 20mg.
• Heavy dessert and custard blends: perfectly usable, but pick liquids with a balanced PG content so the coil keeps up. Very thick, high-VG liquids can starve a small MTL wick.

Switching flavours is straightforward because the tank is small. Empty it, rinse the chamber with warm water, dry it thoroughly, and fit a new coil if you want a clean slate. The ghosting of a previous flavour is more noticeable with strongly flavoured liquids such as menthol or aniseed, so a fresh coil is worth the small cost when you change between very different profiles. If you rotate flavours often, running a spare tank, which is exactly what this accessory is for, is a cheaper and tidier solution than replacing coils every time.

Design and build quality

The T18E family is designed around being unobtrusive. The tank is slim, with a diameter close to that of the battery it is made for, so the combined device sits in a pocket without a bulge and looks like a pen rather than a piece of kit. That form factor has been the selling point of the Endura line since the first generation, and it is why people who find larger tanks intimidating tend to like this style.

Build quality in this class is judged on four things, and it is worth checking each when your tank arrives.

• Thread quality: the 510 connection and the coil thread should screw in smoothly with no grit and no need to force them. A thread that binds or cross-threads on first use is a defect worth reporting.
• Seals: the O-rings at the base and top should be seated evenly and lightly lubricated by the factory. Dry, pinched or twisted seals are the number-one cause of leaking on new tanks.
• Window and chamber: the transparent section should be clear with no cracks. Small tanks that are dropped on hard floors can develop hairline cracks that only show up as a slow weep of liquid.
• Finish: metal parts should be evenly coloured with no peeling. The finish is cosmetic, but it tells you how carefully the unit was assembled.

The materials are the typical mix for the category: a metal body, a transparent tank window, and silicone seals. Innokin has a long record in the market and its parts are generally machined to reasonable tolerances, though like every manufacturer it has the occasional unit that arrives with a poorly seated seal or a scratched window. This is why we recommend checking the tank when it arrives rather than leaving it in a drawer, so any fault can be dealt with within your statutory return period.

On handling, the small size means the tank is easy to fill one-handed, easy to carry, and light enough that it will not strain the connection on a slim battery. The trade-off is that there is little room for extras. You will not get a huge airflow ring, a wide fill port or a large liquid window, and the 2ml capacity means you will be topping up more often than you would on a 4ml or 5ml tank elsewhere in the world. That is a UK regulation issue as much as a design one, since the 2ml limit applies to every nicotine tank sold here.

Battery pairing and charging

Because this is an accessory, the tank contains no battery and has no charging port. Everything related to power lives in the battery you pair it with. That is a common source of confusion for new buyers, so it helps to be explicit: you cannot charge the tank, and you do not need to. You charge the battery.

The Endura T18E kit that this tank belongs to uses a compact built-in battery of roughly 1000mAh, which is a sensible capacity for an MTL device. At the modest wattage a 1.5 ohm coil needs, a battery of that size usually lasts a full day of moderate use, or a day and a half for lighter vapers. Heavier users will likely want to top up once during the day or carry a second battery. Check the exact capacity and charging port type on whichever battery you pair it with, as different batteries use micro-USB or USB-C connectors.

Because the tank uses a standard 510 thread, it will usually fit other batteries and low-power mods too. Before pairing it with a battery from another brand, check three things: the thread is a 510 type, the tank sits flush against the battery without a gap or without having to be forced, and the battery's output range suits a 1.5 ohm coil. Most MTL-oriented batteries run comfortably in the single-digit to low-teen wattage range, which is what these coils want. Variable-wattage mods that go up to 80W or more are possible to use but are overkill, and you will need to turn the wattage right down.

Some sensible charging habits apply whichever battery you use:

• Use the cable supplied with the battery, or a reputable certified cable, plugged into a standard phone-style charger rather than a high-power fast charger that may exceed the battery's rating.
• Do not charge unattended overnight on a soft surface such as a bed or sofa.
• Take the tank off the battery if you are going to leave it unused for a while, as pressure changes can push liquid into the battery connection.
• Never use a battery with a damaged wrap or any swelling.

When a battery eventually reaches the end of its life, do not put it in your household bin. Vapes and their batteries are electrical waste and should be recycled. Most UK vape retailers, many supermarkets and your local council recycling centre run take-back or drop-off points for small electricals and batteries, and you can find your nearest using the national electrical recycling locator on the Recycle Your Electricals website.

Coil and wicking technology

The coil is the working heart of any tank, and in the T18E family it is a small, replaceable Prism-series head. Understanding it helps you get more from the tank and avoid the most common problems.

Resistance and draw style. A resistance around 1.5 ohm is typical for MTL. Higher resistance means less current flows and the coil produces less heat per second, which is why you get a modest cloud and a tight draw. Lower resistance coils, such as the sub-ohm coils used in direct-to-lung tanks, would draw far more power from the same battery and require wide airflow. Always match the coil to the draw style you want.

Construction. Prism-style MTL coils use a wound heating wire surrounded by organic cotton, held inside a metal shell with small inlet ports. Liquid travels from the tank, through the ports, into the cotton, and is vaporised as the wire heats. A mesh coil, by contrast, uses a flat sheet of mesh to spread heat over a larger area and tends to produce bigger, warmer flavour on sub-ohm tanks. For a small MTL tank, a conventional wound coil is the sensible choice since it needs very little power and gives a clean, compact vapour.

Why the wick matters. Cotton can only move so much liquid. If the liquid is too thick, the cotton cannot keep up and you get dry, burnt hits. If it is too thin, the cotton floods and the tank leaks. An MTL coil like this is designed around liquids with a reasonable proportion of propylene glycol, which is thinner than vegetable glycerine and wicks more easily. A 50/50 mix is a safe starting point, and many nicotine salt liquids are mixed to suit this style of device.

Priming. Always prime a new coil. Drip a few drops of liquid directly onto the cotton through the inlet ports, fit the coil, fill the tank, and then let it sit for five to ten minutes before your first draw. Skipping that step is the most common reason a new coil tastes burnt.

Replacement. Change the coil when the flavour fades, when the vapour gets thin, or when you hear gurgling or spitting that does not clear with a priming draw. Most users replace a coil every one to three weeks. Coils are a consumable, so they are normally excluded from warranty claims for wear and tear, though a coil that arrives faulty is a different matter and should be reported.

Nicotine strength guidance for UK vapers

In the UK, e-liquid containing nicotine is capped at 20mg per ml (2%), and that cap applies to every refillable liquid and to any vape sold here. Nicotine bottles are limited to 10ml, and tanks to 2ml. You may remember seeing the same 20mg figure used for the old disposable vapes, and with single-use vapes now banned from sale in the UK, a refillable tank like this one is one of the main routes people have taken to keep vaping at the same strength.

The correct strength for you depends on two things: whether the liquid is freebase or nicotine salt, and how much you smoked or vaped before.

• Nicotine salt liquids (10mg to 20mg): these are smoother at a given strength, which is why they have become the default for low-power MTL devices. If you smoked around 10 or more cigarettes a day, 20mg is the usual starting point. If you smoked less, or you are stepping down from higher strengths, 10mg to 12mg is a good place to start. Nicotine salt at 20mg in a 1.5 ohm tank gives a satisfying hit without being harsh.
• Freebase liquids (3mg to 12mg): these have a sharper throat hit at the same strength, so people usually choose lower numbers. Light smokers and people reducing their intake often settle at 3mg to 6mg. Moderate smokers commonly start at 6mg to 12mg.
• Zero nicotine (0mg): perfectly workable in this tank if you are fully off nicotine or simply enjoy the habit and the flavour.

A useful rule: if you find yourself chain-vaping with long, deep draws and still feeling restless, your strength is probably too low. If you feel light-headed, nauseous, or you get a very harsh throat hit, it is too high. Adjust by one step at a time and give each strength a few days.

Remember that this device is designed for people who already use nicotine, either by smoking or vaping. If you do not use nicotine, there is no health benefit to starting, and anyone under 18 should not buy or use vaping products. Some people also use nicotine-free liquid in this tank simply to enjoy flavour, and that works fine.

Finally, think about PG and VG. For a 1.5 ohm MTL coil, a liquid in the range of 50/50 up to about 60VG is typically suitable. Max-VG liquids, those with 70 percent or more VG, are designed for sub-ohm devices and can starve this coil.

Who the Enduara T18E Tank is for, and who should look elsewhere

The tank is a better match for some vapers than others, and we would rather you buy the right thing than the wrong thing.

It suits:

• Current owners of an Endura T18E-style kit who need a spare, a replacement for a cracked tank, or a second tank to run a different flavour.
• Ex-smokers who want a draw and a hit close to a cigarette and do not want lots of vapour.
• Former disposable users who have moved to a refillable setup because single-use vapes are no longer on sale. A small refillable tank is the closest in feel and effort to a disposable, with the added benefit of choosing your own liquid and lower running costs.
• People who value discretion, such as those vaping at work breaks, on commutes, or in places where large clouds draw attention.
• Beginners who want a simple system with a handful of parts to learn.

It does not suit:

• Cloud chasers. The coil and airflow are not built for large vapour, and higher power will only shorten coil life.
• Direct-to-lung vapers who prefer a loose, open draw. A sub-ohm tank is a better match.
• Anyone wanting a complete kit. This listing is the tank only, so you will need to own or buy a compatible battery.
• Users of very thick, high-VG liquids. Those liquids will struggle to wick through a small MTL coil.
• Non-smokers and under-18s. Vaping products should only be used by adults who smoke or already use nicotine.

If you are unsure whether your existing battery will take this tank, check the thread type, the battery's output range, and the diameter. When in doubt, contact our team with the make and model of your battery before ordering and we can check compatibility with you.

How to use the tank: filling, priming and first puffs

Setting up a refillable tank takes a few minutes and is worth doing carefully, because most early problems come from rushed setup.

Step 1: rinse and dry. Wash all the tank parts in warm water, then dry them completely with a lint-free cloth or leave them to air dry. Manufacturing residue is harmless but affects flavour.

Step 2: fit the coil. Screw the Prism-style coil head into the base of the tank until it is snug, but not overtightened. Check the resistance printed on it matches what you expect for your battery.

Step 3: prime the coil. Put three or four drops of your e-liquid straight onto the exposed cotton through the side holes of the coil.

Step 4: fill the tank. Open the top fill mechanism and fill with e-liquid, aiming the bottle nozzle at the side wall of the tank, not straight down the centre. Fill to just below the maximum line. Never cover the central airflow tube, and do not overfill, because liquid forced into the tube is the classic cause of leaks and gurgling. Close the top firmly.

Step 5: wait. Leave the filled tank upright for five to ten minutes so the cotton saturates fully. This is the single most useful habit you can build.

Step 6: attach the battery. Screw the tank onto the battery until it is snug. If your battery has a button, five quick presses usually switch it on, or it may be draw-activated; follow the battery's own instructions.

Step 7: take the first draws gently. Take a couple of short, gentle draws without pressing the button for long, to pull liquid into the coil. If the first draws taste even slightly burnt, stop, let it sit for a few more minutes and try again.

Day to day, top up before the liquid drops below the coil's inlet ports. Avoid chain-vaping for minutes at a time, because the small coil cannot refill the wick that fast, and gaps between draws keep the cotton wet. Store the tank upright when you are not using it, and keep the whole device out of direct heat, cars on warm days and bags where the button could be pressed by accident.

Vaping products and refill bottles should always be kept well out of reach of children and pets. Nicotine liquid can be harmful if swallowed or if it contacts skin or eyes, so wash any spills off promptly with water.

Troubleshooting common problems

Most issues with a small MTL tank are easily solved. These are the most common problems and their usual causes.

Burnt taste. Almost always a dry or poorly primed coil. Remove the tank, add a few drops directly onto the cotton, let it sit for ten minutes and try again with gentle draws. If it persists, either the coil is at the end of its life or the liquid is too thick for the wick. Fit a fresh coil and consider a higher PG liquid.

Leaking from the base or airflow. Check the O-rings first: they should be seated flat and not pinched. Make sure the coil is fully screwed in, not overfilled, and the top is closed firmly. Also check the tank for hairline cracks. Leaks are more likely when you fill too high or when the tank is stored on its side or travels in a hot pocket or bag.

Gurgling or spitting. Usually condensation or liquid pooling in the central tube. Take the tank off, wipe the tube, and blow gently through the airflow to clear it. Persistent spitting often points to a coil that is flooded by thin liquid or a seal that is not quite right.

Weak vapour. Check the liquid level is above the inlet ports, the battery is charged, the tank is screwed on properly, and the airflow is not blocked by lint or residue. If those are fine, the coil has probably worn out.

Flavour fades after a few days. Sweet liquids coat the coil in residue. Swap the coil, and consider switching to less sweet liquids if you are getting through them fast.

Battery flashes or does not fire. This is typically a connection problem, not a tank fault. Clean the contacts at both ends with a dry cotton bud, check that the coil has the right resistance for the battery, and make sure the thread is seated properly. Short-circuit and low-resistance warnings usually indicate a wrongly fitted coil.

Cracked or damaged tank. Stop using it immediately, as it will leak into the battery. Replace the tank rather than trying to patch it.

If you have checked all of this and still have a problem, take photos and contact us with your order number. A faulty tank received within the first 30 days has a statutory return right under UK consumer law, and we will help you resolve it.

Value for money and honest comparisons

Accessory tanks are priced to be affordable, and the key question is what you get compared with the alternatives. Here is a fair look at where this tank sits.

Against buying a whole new kit. If your battery is working but your tank is damaged, a replacement tank is much cheaper than a complete kit, and you retain all the accessories you already own. For anyone who already has a T18E-style battery, a spare tank is among the cheapest upgrades in vaping, especially if you rotate between two flavours.

Against disposables. Disposable vapes can no longer be sold in the UK, but even before the ban the running cost was high. A refillable tank costs a bit more up front, then a 10ml bottle of e-liquid and an occasional coil cost far less per week than replacing single-use devices. Refilling is also far better for the environment because you avoid throwing away a lithium battery every few days.

Against other MTL tanks. Aspire's Nautilus line is the most commonly cited rival for small MTL tanks. It has a long track record, a wide range of coils and good availability, and many vapers find it an excellent all-rounder. Some versions offer more adjustment than the T18E tank. On the other hand, the T18E tank is slimmer and sits better on Innokin's slim batteries, so the choice often comes down to the battery you already own. Other contenders include the small refillable tanks from Vaporesso and Uwell, which are worth a look if you want a different coil range or a different aesthetic.

Against pod systems. Closed pod kits are simpler still, with cartridges that you replace or refill. A tank like this gives you more choice, since coils are cheap and widely available, but it asks a little more of you in terms of setup and maintenance. If you want absolutely zero fuss, a pod may suit you better.

Where it falls short. The 2ml capacity is a regulatory limit and so is shared by all UK tanks, but you will still be refilling often. The tank-only listing means you must already own a compatible battery. Beyond that, the coils are consumables and add to running costs, though at typical coil prices the cost per week stays low.

Verdict. For owners of a compatible battery who want a spare, a replacement or a second flavour setup, the Enduara T18E Tank is good value and does a simple job reliably. For people starting from nothing, a full kit is the better first purchase, and the tank then becomes a sensible second item.