Innokin Coolfire Z80 Zenith II Vape Kit Green

Overview

The Innokin Coolfire Z80 Zenith II Vape Kit Green by Innokin in Green at 0mg. Free UK delivery over £20, same-day dispatch on weekday orders before 4pm.

Innokin Coolfire Z80 Zenith II Vape Kit Blue: overview

The Innokin Coolfire Z80 Zenith II Vape Kit in Blue is a refillable starter kit that pairs Innokin's Coolfire Z80 mod with the Zenith II tank. It sits in the middle ground of the UK vaping market: more adjustable and more capable than a basic pod system, but far less fiddly than a dual-battery box mod or a mechanical setup. The mod has a battery built into the body, so there are no 18650 cells to buy, match, wrap or carry around, and the output is adjustable up to a ceiling of 80 watts, which is where the Z80 part of the name comes from.

The Zenith II tank is a compact, sealed-feeling unit that is filled from the top, uses replaceable Z-series coils and has an adjustable airflow ring at the base. In the UK the tank capacity is limited to 2ml by law, so this kit is built around short, frequent refills rather than a big reservoir. That limit applies to every refillable tank sold here, whichever brand you buy, and it is worth knowing before you compare the kit with listings from overseas shops.

This is a kit that rewards a little experimentation without punishing a beginner. You can leave the device on a modest wattage and treat it as a straightforward mouth-to-lung or restricted-lung setup, or you can nudge the power up to get a warmer, fuller vapour once you know what you like. The blue finish gives it a clean, slightly understated look compared with the louder colourways found on some competing kits.

Because it is refillable, the Coolfire Z80 kit also sits on the right side of current UK rules. Single-use disposable vapes have been banned from sale in Great Britain since 1 June 2025, so many people who used to buy disposables are now moving to refillable kits like this one. If you are one of them, the sections below explain what to expect, how to choose a nicotine strength, how to run the device safely and how it stacks up against similar kits at a comparable price.

• Type: refillable adjustable-wattage kit with built-in battery
• Maximum output: up to 80W
• Tank: Zenith II, 2ml UK capacity, top-fill, adjustable airflow
• Colour: Blue
• Suited to: switchers from smoking, ex-disposable users, and anyone wanting a one-device daily setup

Key specifications at a glance

Before getting into how the kit performs, it helps to lay out the numbers. Where a figure below is approximate, that is because Innokin publishes slightly different details across regions and packaging revisions, so always check the box in your hands against what we state here.

• Output range: variable wattage, from a low starting point up to a maximum of 80W.
• Battery: built-in rechargeable lithium-ion battery in the region of 3000mAh, charged over USB-C.
• Tank: Zenith II, 2ml capacity in the UK edition, filled from the top.
• Coils: Innokin Z-series replacement coils, with the kit shipping with one already fitted. Resistance and wattage range are printed on the coil itself.
• Airflow: adjustable base airflow ring for tighter or looser draws.
• Display: a small screen showing wattage, resistance and battery level, controlled from the fire button and adjustment buttons.
• Safety protections: typical built-in protections including short-circuit, low-resistance, over-time and low-voltage cut-offs.
• Connection: 510 thread, which means the mod can in principle take other 510 tanks, although pairing it with the Zenith II is what the kit is tuned for.

A few of these figures deserve context. A battery of around 3000mAh sounds large, and for a built-in unit it is a decent capacity, but the real-world run time depends heavily on the wattage you choose. At 20 to 30W you can expect a full day of normal use for many people. At 60W and above you will drain the battery noticeably faster, and you will be topping up the tank more often too, because the coil is vaporising liquid at a higher rate.

The 2ml tank capacity is a legal requirement rather than a design choice. If you see tanks advertised with a larger volume, they are either international editions or come with an extension glass that is not sold for use in the UK. The tank itself is made to be refilled from 10ml bottles, which is the maximum bottle size permitted for nicotine e-liquid here.

Finally, the kit is sold as a starter kit, not as a complete supply of consumables. Expect the box to contain the mod, the tank with a coil fitted, a USB-C charging cable, and the usual paperwork and spare seals. E-liquid is sold separately, and a spare coil is worth ordering at the same time so you are never caught without one.

Performance and vapour delivery

On paper an 80W ceiling suggests a device aimed at big clouds, and the Coolfire Z80 can certainly do that. In practice, most people will spend the bulk of their time in the lower half of the range, and that is where the kit feels most comfortable. At moderate settings the Zenith II delivers a smooth, steady pull with a warm vapour and a clear response to each press of the fire button.

It is worth separating power from performance. Power is simply the wattage you set. Performance is how well the tank turns that power into satisfying vapour without burning the liquid or leaving a harsh edge. The Zenith II holds up well here because the coil is designed to be run across a defined range, and staying inside that range gives you the best balance between flavour and vapour volume.

• Low range (roughly 15 to 30W): cooler, tighter draws, best for nicotine salt liquids and for people moving over from disposables or cigarettes.
• Middle range (roughly 30 to 55W): a good all-round zone where most flavour and vapour production sits, suitable for 50/50 and 70/30 liquids.
• Upper range (55W and above): warmer, heavier vapour with more throat feel, better matched to higher-VG liquids and lower nicotine strengths.

The firing response is quick enough that you will not notice a delay between pressing the button and feeling the draw, and the output stays consistent through a full battery cycle, with the usual slight softening as the battery nears its lower limit. Because the power is regulated by the chipset, the vapour should not suddenly drop off mid-session unless the battery is genuinely close to empty.

One honest caveat: the 80W maximum does not mean you should use 80W. The tank and coil have a recommended window, and going above it tends to burn the liquid quickly, shorten coil life and produce a dry or scratchy hit. Treat the top of the range as headroom for different coils rather than a target. If you find yourself pushing the wattage to get flavour, the usual fix is a fresh coil, a thinner liquid or a slightly more open airflow, not more power.

For those migrating from disposables, the difference you will notice most is control. A disposable gives you one fixed experience until it runs out. The Coolfire Z80 lets you tune the strength, warmth and airflow of each session, and that flexibility is the main reason people keep a kit like this as their daily device.

Flavour profile and what to expect from the tank

A tank and coil do not have a flavour of their own, but they shape how any liquid tastes. The Zenith II is tuned toward clean, fairly accurate flavour delivery rather than a heavy, smoky warmth. Fruit liquids come through bright and defined, menthol and ice blends stay crisp, and dessert or custard profiles keep their sweetness without turning cloying, provided you keep the power within the coil's recommended range.

Flavour is affected by four things in particular, and it is useful to know which lever to reach for when something tastes slightly off.

• Wattage: lower power gives a cooler vapour that tends to highlight sharper, fresher notes such as citrus, berry and mint. Higher power draws out richer, sweeter and bakery-style flavours but can flatten delicate fruit.
• Airflow: tighter airflow concentrates flavour and slows the vapour, while open airflow produces a cooler, airier, more diluted taste.
• Coil age: a new coil tastes its sharpest in the first few days. As residue builds up, flavour dulls gradually, and eventually you will notice a faint burnt note that signals it is time to swap.
• Liquid ratio: thinner 50/50 liquids wick quickly and give stronger flavour, while thick high-VG liquids need a bit more power and can feel more muted in a small tank.

When you first fit a coil, let it sit for several minutes with the tank full so the cotton absorbs liquid fully before you press the button. Skipping this step is the single most common reason a brand-new coil tastes burnt or dry, and it is entirely avoidable. Take a few gentle, short draws at a low wattage first, then raise the power slowly to your preferred setting.

A practical way to think about flavour is that every liquid has a comfortable wattage zone. Fruit and ice blends usually sit well in the lower-to-middle part of the range. Creamy desserts, tobacco and heavier blends often come alive a little higher. Test in steps of 2 or 3 watts and stop as soon as the flavour peaks, because past that point you are only making the vapour hotter, not tastier.

If you want to try different flavours without wasting a full bottle, buy a couple of smaller bottles or a multi-pack of shortfills or salts. The Zenith II is easy to flush and refill, so rotating between flavours is simple, although a few minutes of rinsing and a fresh coil give the cleanest switch between very different profiles, for example from a strong menthol to a delicate fruit.

Design, build quality and the blue finish

The Coolfire Z80 has a rounded, pocketable body that feels sturdier than its size suggests. The shell is metal with a smooth coated finish, and the blue colour is a deep, slightly satin shade rather than a glossy one, which helps it hide fingerprints and light scuffs better than many shinier devices. The weight is reassuring without being heavy, and the kit sits comfortably in a coat pocket, a bag or a car cup holder.

The controls are kept simple. There is a fire button on the side, two adjustment buttons for raising and lowering the wattage, and a small display at the front that shows your current settings. Menus are short and intuitive, so you can pick the device up without reading a manual, although we still recommend reading the quick guide once for the lock and unlock sequence.

• Fit and finish: panel gaps are tight, and the threads on the tank and drip tip turn smoothly with no gritty feel.
• Buttons: firm, with a clear click, so accidental firing in a pocket is unlikely when the device is locked.
• Tank: compact and well proportioned against the mod, with no awkward overhang at the connection.
• Drip tip: a standard comfortable mouthpiece, easy to clean and replaceable with other compatible tips if you prefer a different shape.
• Charging port: USB-C, so any common cable works and there is no proprietary lead to lose.

It is worth being clear about what the build is and is not. This is a well-made everyday device, but it is not a ruggedised kit. If you work somewhere wet, dusty or hard on equipment, such as a building site, you might prefer a device with a dedicated dust and water resistance rating. For general daily carry, normal handling and the occasional drop onto a soft surface, the Coolfire Z80 is a sensible and tidy option.

The glass section of the tank is the part most likely to be damaged by a hard knock, so avoid keeping the kit in a pocket alongside keys or coins. Replacement tank parts are usually available separately if the worst happens, which is a useful reason to buy from a retailer that stocks Innokin spares.

Overall the design suits someone who wants a discreet, neat device that does not look like a gadget. The blue finish is easy to live with, and there is no flashy lighting or branding to draw attention in public.

Battery life and charging

The built-in battery is one of the main reasons to pick this kit over a pod device or a tank with a removable cell. You get a generous capacity in a single compact body, and you never need to buy, rotate or safely store loose 18650 cells. In ordinary use you simply plug the kit in overnight, much like a phone.

How long a charge lasts depends mostly on your wattage and your vaping habits. As a rough guide for a battery in the region of 3000mAh:

• Low wattage (15 to 30W): typically a full day for a moderate user, and often a day and a half for light use.
• Mid wattage (30 to 50W): usually most of a day, with a top-up in the evening for heavier use.
• High wattage (55W and above): expect to charge once or twice a day if you vape frequently.

These are indicative figures, not guarantees. Cold weather reduces battery performance, and a tired coil can draw more power for the same result, so if your battery life suddenly drops, check the coil before blaming the battery.

Charging is over USB-C. A standard phone charger or a laptop port will work, and you do not need a special charger. For battery longevity, use a reputable charger and cable, avoid charging on soft surfaces such as a bed or sofa, and do not leave the device charging unattended for long periods. Built-in lithium-ion batteries are safe when treated properly but can become a fire risk if damaged, overheated or charged with a poor-quality cable.

• Charge on a hard, non-flammable surface.
• Unplug when the device is full if you can, rather than leaving it on charge for days.
• Keep the device out of direct sun and away from hot car dashboards.
• Stop using it and stop charging if the casing swells, smells odd or becomes unusually hot.

Because the battery is built in, you cannot swap it out when it ages. After a year or two of heavy daily use, the capacity will fall gradually, which is normal for any lithium-ion product. When the device finally reaches the end of its useful life, do not put it in a household bin. Vape devices with built-in batteries count as small electrical waste, and UK retailers that sell vapes are required to take old ones back. Most council recycling centres and many larger supermarkets also have small electrical recycling drop-off points. Local authorities usually list their nearest locations on their websites.

Zenith II tank and coil technology

The Zenith II is the part of the kit that determines how the vapour feels, so it deserves a closer look. It is a compact top-fill tank built around Innokin's Z-series replacement coils. The kit comes with a coil already fitted so you can start as soon as you have filled the tank and let it prime.

The coil is where the liquid is heated. A coil is a small heating element wrapped around or built into an absorbent wick. When you press the fire button, the battery sends power to the coil, the coil heats up, and the liquid held in the wick turns to vapour. Modern coils usually take one of two forms: a round wire wrapped around cotton, or a mesh sheet that increases the heating surface area. Mesh designs typically heat more evenly and can produce flavour and vapour more quickly, which is why they have become popular in current tanks.

• Lower resistance coils: usually run at higher wattage, produce warmer and larger vapour and use liquid faster. Better with higher-VG liquids and lower nicotine strengths.
• Higher resistance coils: run at lower wattage, give tighter, cooler draws and use less liquid and less battery. Better with nicotine salts and higher strengths.

The printed resistance and recommended wattage range on each coil are your guide. The kit's chipset reads the resistance automatically when you fit a coil, so you only need to choose a wattage inside the printed range. If you are unsure, start at the low end and work up.

Coil life varies. A reasonable expectation is somewhere between one and three weeks of daily use, depending on your liquid, wattage and habits. Sweet liquids with high sweetener content, for example some dessert and candy profiles, tend to build up residue faster, so the coil may need replacing sooner. Using a lower wattage and giving the coil time to absorb liquid between hits will extend its life.

Fitting a new coil is straightforward: unscrew the base, remove the old coil, screw in the new one and refit the tank. Prime the new coil by dropping a few drops of liquid directly onto the cotton openings, fill the tank, wait five to ten minutes, then start at low power. The airflow ring at the base lets you tighten or loosen the draw, which also changes how the coil behaves. A tighter setting gives a more concentrated and cooler hit, while a more open setting gives a more airy, warmer vapour.

Spare coils are sold separately, and since a coil is a consumable, it is worth holding at least one spare. Always buy genuine Innokin coils that match the Zenith II to avoid fit and safety problems.

Choosing a nicotine strength and e-liquid

Nicotine choice matters more than most beginners expect. A strength that is too low leaves you chaining draws and never feeling satisfied. A strength that is too high leads to a harsh throat hit, dizziness or nausea. The right setting depends on your smoking history, your wattage and the type of nicotine in the liquid.

In the UK, e-liquid is capped at 20mg/ml nicotine strength, and refill bottles are limited to 10ml for nicotine liquids. That 20mg cap is the same limit that applied to disposable vapes before they were banned, and it is a useful reference point because many people now switching from disposables are used to the 20mg experience. Nicotine-free liquids and shortfills (nicotine-free liquid sold in a larger bottle with room to add a nicotine shot) are also widely available.

• Nicotine salts (10mg to 20mg): smoother at higher strengths, absorbed quickly, and best suited to low wattage and tighter airflow. A good match if you came from heavy smoking or from 20mg disposables.
• Freebase nicotine (3mg, 6mg, 12mg): the traditional style, best suited to higher wattage and more open airflow. Stronger freebase liquids can feel harsh at the throat, which is why salts take over above roughly 12mg.
• Shortfills with a nic shot: flexible if you like big bottles and a lower strength, typically around 3mg.

As a starting guide, a heavy smoker might begin with a 10mg or 20mg nicotine salt at low power, a moderate smoker with 6mg to 12mg, and a light smoker or social user with 3mg. Adjust after a week. If you find yourself craving a cigarette between sessions, go up. If you feel lightheaded or queasy, go down or use shorter draws.

Matching liquid to wattage is just as important. Higher-VG liquids, such as 70/30 VG/PG, are thicker and produce larger clouds. They suit the middle and upper power range and lower nicotine strengths. Higher-PG liquids, such as 50/50 blends and most nicotine salts, are thinner, deliver flavour and throat hit more sharply and suit lower power. The Zenith II's coils handle both, but you should stay within the printed wattage range to avoid dry hits.

If your aim is to stop smoking, the goal is to find a strength that satisfies you without going higher than necessary, then reduce gradually over time. If you do not smoke, you probably do not need nicotine at all, and the kit works perfectly well with nicotine-free liquid.

Who the Coolfire Z80 Zenith II kit is for

No single device suits everyone, so here is an honest picture of who benefits from this kit and who might be better served elsewhere.

It is a good fit if you:

• are moving from disposables to refillable and want something simple but adjustable.
• want one device that handles both a tight draw and a warmer, fuller vapour.
• prefer a built-in battery rather than buying and managing separate cells.
• like the idea of changing flavours without changing the whole device.
• want a neat, discreet device in a calm colour.

You may prefer something else if you:

• want the smallest, lightest pod device possible. A slim pod system is more pocketable and requires even less thought.
• need a rugged device for outdoor or trade work. Look for kits with a dust and water resistance rating.
• want to build your own coils or use rebuildable atomisers. This is a ready-made coil system, not a rebuildable platform.
• are a non-smoker. Vaping is for adult smokers and existing vapers who want an alternative, and it is not recommended for anyone who has never smoked or vaped.
• are under 18. It is illegal in the UK to sell vaping products to anyone under 18, and the kit should be kept well out of reach of children and pets.

For first-time refillable users, the learning curve is gentle. You will need to understand coil priming, topping up the tank and choosing a sensible wattage, but all three are straightforward once you have done them a couple of times. A good first week is to start on a mid-strength liquid, keep the wattage at the low end of the coil range, and make small adjustments only.

For experienced vapers, the Coolfire Z80 works well as a daily driver or a back-up device. It will not replace a high-end box mod for people who want temperature control or deep customisation, but it covers the practical needs of most people at a reasonable price and with very little maintenance.

If you are not sure which side of the line you fall on, think about how you actually vape. If you take short, frequent puffs through the day, a tidy device like this suits you well. If you want long, heavy sessions, a larger-capacity setup might be a better option.

How to use the kit: step by step

Setting up the kit takes only a few minutes. Follow these steps in order, and the first session will be much smoother.

• 1. Charge first. Plug the kit into a USB charger with the supplied USB-C cable and let it charge fully before first use. This is good practice for any new battery.
• 2. Check the coil. The kit ships with a coil fitted. Make sure it is seated firmly and that the base of the tank is screwed on snugly.
• 3. Fill the tank. Open the top-fill section, tilt the tank, and fill with liquid from a 10ml bottle. Avoid filling over the central chimney tube, and do not fill past the maximum line. Close the top section firmly.
• 4. Let the coil soak. Wait five to ten minutes so the cotton absorbs liquid. Dry cotton burns instantly, and a burnt coil cannot be rescued.
• 5. Set the airflow. Start with the airflow ring partly open. Close it for a tighter, more cigarette-like draw, or open it for a looser, airier one.
• 6. Turn on and set wattage. Press the fire button five times quickly to switch on, which is the usual convention, then use the adjustment buttons to choose a wattage. Start at the low end of the coil's range.
• 7. Take your first draws. Take a couple of short, gentle draws, wait 20 to 30 seconds between each, and raise the wattage gradually if you want more output.
• 8. Lock when not in use. Use the lock function when the device is in a pocket or bag so it cannot fire accidentally.

Draw style matters. A mouth-to-lung draw means drawing vapour into your mouth first and then inhaling it, similar to smoking a cigarette. A direct-lung draw means inhaling straight into the lungs. With the Zenith II you can use either, but a mouth-to-lung or restricted-lung style suits low and moderate wattage with nicotine salts, while a more open lung draw suits higher wattage and lower nicotine.

Keep the kit clean. Wipe the connection point with a dry cloth now and then, rinse the tank with warm water when you change flavour, and let it dry fully before refilling. Never use the kit while charging.

Store the device upright, away from heat, and keep liquid bottles closed and out of reach of children. Nicotine is toxic if swallowed, so any spillage should be wiped up promptly and hands washed after refilling.

Troubleshooting common problems

Most problems with a kit like this are minor and easy to fix. Here are the issues we hear about most often and what to do about them.

• Burnt taste straight after fitting a coil: the coil probably did not soak long enough. Replace it if the taste does not clear after a few gentle draws at low power, and next time wait longer before firing.
• Dry or scratchy hits: the tank may be low, the wattage may be too high for the coil, or a thick liquid may not be wicking fast enough. Refill, reduce the power by a few watts and open the airflow slightly.
• Gurgling or spitting: there is too much liquid around the coil or condensation in the airflow path. Blow gently through the drip tip with the device off, wipe it dry, and avoid overfilling.
• Leaking from the base or airflow ring: check that the coil is screwed in fully, that the seals are seated and that the tank is not overfilled. Leaks are more likely after a flight or a rapid change in temperature, so keep the airflow closed and the tank only partly full when travelling.
• The device shows a no atomiser or check coil message: the coil is not making good contact. Unscrew the tank, make sure the base and connector are clean and dry, then screw it back on firmly.
• Short battery life: a worn coil, high wattage or cold weather are the usual causes. Replace the coil first and lower the power before assuming the battery is at fault.
• Device will not fire or will not turn on: check whether it has been locked, charge it for at least thirty minutes, and try again. If it still fails, try a different cable and charger.
• Device gets warm while charging: mild warmth is normal. If it is hot to the touch, unplug it and let it cool. Do not use it again if it stays unusually hot.

If you suspect a fault with the mod itself, such as a button that does not respond or a screen that stays blank after a full charge, stop using it and contact the retailer. Do not try to open the casing. The built-in battery is not user-serviceable, and opening the device can cause damage or injury.

When a device is beyond repair, do not throw it in the household bin. Lithium batteries in refuse vehicles and landfill sites are a real fire risk. Take it to a household waste recycling centre, to a store with small-electrical recycling, or return it to the retailer, as UK vape sellers are required to accept used devices.

Value for money and how it compares with similar kits

Price is only part of value. A kit that costs a little more but lasts longer, wastes less liquid and gives you more control may cost you less over a year. The Innokin Coolfire Z80 Zenith II sits in a reasonably priced middle tier of refillable kits, and it holds up well against comparable rivals.

It helps to look at the running costs. A refillable kit has a one-off purchase price, then ongoing costs for liquid and coils. A coil typically costs a few pounds and lasts one to three weeks, and a 10ml bottle of liquid usually lasts a moderate user several days. Over a month, a typical refillable setup is generally far cheaper than buying disposables regularly, and it also produces much less waste.

• Versus slim pod kits (for example Uwell Caliburn or similar): pod kits are smaller and simpler, with lower upfront effort, but they offer little adjustability, and their pods are less flexible in terms of coil choice. The Coolfire Z80 gives more control and a larger battery.
• Versus Vaporesso GTX or Luxe-style kits: these are close competitors, with similar power ranges and mesh coil systems. Differences come down to ergonomics, coil availability and personal preference. Both ranges are reasonable choices, and some people simply prefer the feel of one over the other.
• Versus Geekvape Aegis-style kits: Aegis devices are known for their tough construction and water and dust resistance. If durability matters most, they are worth a look. If you want a lighter, tidier device for everyday use, the Coolfire Z80 is often more comfortable to carry.
• Versus Voopoo Drag-style kits: these also offer wide power ranges and good coil systems, often with larger form factors. The Coolfire Z80 is the more compact option.

Where the kit is less strong: the 2ml tank means more frequent refills for heavy users, the built-in battery cannot be swapped, and the coil range is narrower than on platforms with huge aftermarket support. Those are fair trade-offs for the compact size and simple operation, but they are worth knowing before you buy.

In short, the kit is good value for people who want a dependable, adjustable, everyday device without paying for features they will not use. If you value portability, simple charging and clean flavour, it is a sensible choice. If you want rugged build, huge tank capacity or full customisation, one of the alternatives above may suit you better. Whichever you choose, buy from a UK retailer that sells genuine products and offers proper after-sales support.