Eco Vapours UK, Hardware and pod kits guide, Last updated 10 September 2026, 18+ only. Contains nicotine, which is addictive.
A vape kit spec sheet lists four numbers that matter and one that gets all the attention. Battery capacity in mAh, nicotine strength in mg per ml, pod size in ml, and coil resistance in ohms tell you how long a kit runs, how strong the hit is, and how tight the draw feels. The wattage range and puff count sticker are consequences of those four, not extra facts, and once you can read them properly, you can compare two kits on paper without touching either one.
Since the UK single use vapes ban took effect on 1 June 2025, every legal vape sold in the UK is rechargeable or refillable, and every spec sheet lists mAh, mg, ml and ohms, usually alongside a wattage range and a puff count claim. Most shoppers skim past the small print and buy on the biggest number. That is a mistake: the numbers interact in predictable, physics based ways, and understanding them tells you which prefilled pod kits genuinely suit your habit rather than which has the loudest box. This guide is for existing adult smokers and vapers, 18+ only, and every calculation here is an illustrative estimate, not a laboratory measurement.
What Is a Vape Kit Spec Sheet, and Why Does It Matter?
A vape kit spec sheet is the block of technical figures on the box or product page describing what a device can actually do, rather than how it is marketed. A typical UK prefilled pod kit spec sheet lists battery capacity in mAh, nicotine strength in mg, pod capacity in ml, resistance in ohms, a wattage range, and a puff count claim. Every kit across our vape hardware and mods range carries the same set of figures.
Two kits can look identical and cost the same, yet behave completely differently, because one number changes the picture. A 1200mAh battery sounds bigger than a 500mAh one, but if it feeds a coil at nearly double the wattage, it can run out sooner in real use. Reading a spec sheet properly means reading the numbers together, not picking the biggest one.
mAh Explained: What Vape Battery Capacity Actually Means
mAh stands for milliamp hours, a unit of electrical charge. It tells you how much energy a battery can store, not how powerful it is or how long it lasts alone. A 500mAh battery holds roughly half the charge of a 1000mAh one, but the coil attached decides how fast that charge gets used up.
On current UK prefilled pod kits, mAh figures fall into three loose bands: pocket sized MTL kits around 500mAh to 650mAh, mid sized kits with swappable pods around 800mAh to 1000mAh, and big puff sub ohm kits, marketed on high puff count claims, around 1000mAh to 1500mAh or more, since their coils draw far more current per puff. These are typical UK market ranges, not a guarantee for any device; check the individual spec sheet for the true figure.
A bigger mAh figure also means a bigger, heavier cell, a genuine size and weight trade off rather than a free upgrade. If discretion matters as much as run time, a higher mAh number is not automatically the right choice.
mg Explained: What Nicotine Strength on a Vape Spec Sheet Means
mg on a vape spec sheet means milligrams of nicotine per millilitre of e liquid, written mg/ml. It has nothing to do with the battery; it is a property of the liquid alone. UK law caps nicotine containing e liquid at 20mg/ml, under Regulation 36 of the Tobacco and Related Products Regulations 2016. Any device or bottle claiming more than 20mg/ml is not TPD compliant, whatever the packaging says.
Most current prefilled pod kits use nicotine salt at or near that 20mg cap, since salts feel smoother at higher strengths than freebase, which is why switching away from disposables kept the same bar style flavours and strength. A higher mg figure means fewer puffs are needed for a familiar hit, which matters for the cost arithmetic later, but strength alone does not decide how harsh the hit feels. Ohms and wattage do that.
ml Explained: Pod and Bottle Capacity Limits on a Vape Kit Spec Sheet
ml on a spec sheet describes liquid volume: how much e liquid the pod holds, and separately how big the refill bottle is. UK regulation caps both. Under the UK e cigarette regulations for consumer products, a pod may hold a maximum of 2ml, and a refill bottle a maximum of 10ml, across every legal UK brand, so a box boasting "extra capacity" is, at most, matching the ceiling every compliant device shares.
Because 2ml is a hard ceiling, manufacturers extend a kit's run time by bundling multiple replacement pods rather than growing the pod itself. When a headline number implies far more than 2ml of continuous liquid, it is describing the whole kit with spare pods included, not one pod's capacity, worth checking before comparing against a rival's single pod figure.
Ohms Explained: What Coil or Pod Resistance Means for Your Draw
Ohms measure electrical resistance, and on a spec sheet this figure belongs to the coil inside the pod, not the battery. Resistance decides how much current flows for a given voltage, and by extension how much power reaches the coil and how airy or restricted the draw needs to be to keep that power comfortable to inhale.
Coils at or above roughly 1.0 ohm, commonly 1.2 to 1.6 ohms on UK pod kits, are generally paired with restricted airflow, producing a tight, cigarette like mouth to lung, or MTL, draw. Coils below roughly 1.0 ohm, often 0.6 to 0.8 ohms on big puff kits, pair with more open airflow: sub ohm, or direct to lung, DTL, vaping, drawing straight into your lungs for noticeably more vapour.
Neither band is objectively "better." They describe two vaping styles, and picking the wrong one is a common reason a new kit sits unused. Ex smokers usually find MTL more familiar; cloud chasers usually prefer DTL. The suitability matrix below sets this out by profile.
Wattage Explained: How a Vape Kit's Wattage Range Connects to Its Ohms
Wattage measures power. On a fixed prefilled pod kit you do not dial it in; the printed wattage range is set by the manufacturer to suit the resistance of the pod fitted as standard, following basic electrical physics: power in watts equals voltage squared divided by resistance in ohms. A typical lithium cell in these kits sits around 3.7 volts nominal.
Run that formula on a 1.2 ohm MTL coil and you get roughly 11 watts, why MTL kits typically print 9 to 11 watts. Run it on a 0.6 ohm sub ohm coil and you get roughly 23 watts, why big puff kits typically print a band in the high teens to low twenties. This is illustrative, not a measured device, but it shows wattage and ohms are two views of one design choice, not independent numbers.
Puff Count Explained: How Reliable Are the Numbers on a Vape Kit Spec Sheet?
The puff count sticker, whether it says 10,000, 20,000 or 60,000, is the most marketed number on a spec sheet and the least useful on its own. Manufacturers generally derive it from a standardised lab protocol: a fixed puff length and interval, run until the battery or liquid is exhausted. Real vaping does not follow a lab protocol; a short MTL puff and a long DTL draw pull different amounts of energy and liquid, so two people on the same kit get different real world totals.
There is a distinction almost no spec sheet makes clear: a puff count claim on a big puff kit often describes the entire kit as sold, spare pods included, not what one charge on one 2ml pod delivers. Since every UK pod is capped at 2ml regardless of the sticker, a very high figure on a kit sold with one pod fitted deserves a second look, because what you get through in one sitting is governed by mAh, wattage and ohms together, worked through next.
How to Do the Vape Kit Spec Sheet Maths: mAh, Watts and Ohms Together
Two steps turn raw spec numbers into a useful puffs per charge estimate, the calculation manufacturers rarely publish. First, convert mAh into usable energy: divide by 1000, multiply by the nominal cell voltage of 3.7, then apply an 80% usable capacity allowance, since a protection circuit cuts off before full drain. Second, find energy per puff: wattage multiplied by average puff length in seconds, divided by 3,600. Dividing the first by the second gives estimated puffs per charge, an illustrative estimate, not a measurement of a specific tested unit.
Worked Example One: An Entry Level MTL Vape Kit Spec Sheet
Take a typical entry level MTL kit: a 500mAh battery, a 1.2 ohm coil, and a fixed wattage band of roughly 9 to 11 watts. The 80% allowance gives about 400mAh usable, or 1.48 watt hours. At an average MTL puff of 1.5 seconds and a midpoint 10 watts, each puff costs roughly 0.00417 watt hours, so 1.48 divided by 0.00417 gives an estimated 355 puffs per charge, rounding to 340 to 370. For someone on around 10 a day, that is a full day's use; closer to 20 a day, expect a top up. Check the printed mAh and wattage band on a kit like our Defender F1 10000 pod kit review before trusting the sticker alone.
Worked Example Two: A Big Puff Sub Ohm Vape Kit Spec Sheet
Now take a typical big puff sub ohm kit: a 1200mAh battery, a 0.6 ohm coil, and a fixed wattage band of roughly 18 to 20 watts. The same 80% allowance gives about 960mAh usable, or 3.55 watt hours. DTL puffs run longer, so at an average 2.5 seconds and a midpoint 19 watts, each puff costs roughly 0.0132 watt hours, giving an estimated 269 puffs per charge.
That is worth pausing on: it is lower than the MTL example, despite a battery more than double the size. A bigger mAh number buys more stored energy, not automatically more puffs, and a sub ohm coil spends that energy roughly three times faster per puff. This is why headline claims in the tens of thousands on big puff kits, such as devices in the style of our Hyola Ultra 30K prefilled pod kit review, generally describe the whole product across its full liquid allowance and any bundled spare pods, not one charge on one pod. Read the small print next to the sticker; it usually clarifies what the number counts.
Vape Kit Spec Sheet Charge Time and Coil Life: How Long Do the Numbers Actually Last?
Charge time follows roughly the same arithmetic, in reverse. A USB C charger at around 1 amp charges a battery in approximately its mAh figure divided by 1000 hours, before a slower trickle stage. A 500mAh kit typically takes around 30 to 45 minutes to a usable full charge, a 1200mAh kit closer to 70 to 90 minutes: illustrative ranges, not a measured pairing.
Coil and pod life rarely appears on the spec sheet, yet it drives real running cost. A pod is commonly past its best after roughly one to three weeks of use, or 200 to 300 puffs, as the wick saturates and flavour fades or turns burnt. Since every legal UK pod tops out at 2ml, this is really how many charge and refill cycles one pod delivers before flavour drops.
Vape Kit Spec Sheet Cost Arithmetic: What mg, ml and Duty Mean for Price Per Puff
From 1 October 2026, a new Vaping Products Duty adds £2.20 per 10ml of vaping liquid, plus VAT, regardless of nicotine content, per HMRC's Vaping Products Duty guidance. Since every legal pod is capped at 2ml, that duty attaches a fixed cost to a fifth of a bottle, worth factoring into any comparison rather than pricing on shelf price alone. The table below applies the worked examples to a rough cost per charge picture.
| Spec sheet figure | Entry level MTL kit | Big puff sub ohm kit |
|---|---|---|
| Battery capacity | 500mAh | 1200mAh |
| Coil/pod resistance | 1.2 ohms | 0.6 ohms |
| Typical wattage band | 9 to 11W | 18 to 20W |
| Assumed average puff length | 1.5 seconds | 2.5 seconds |
| Estimated puffs per full charge | ~340 to 370 | ~250 to 290 |
| Estimated charge time, 1A USB C | ~30 to 45 minutes | ~70 to 90 minutes |
Read as cost, the sub ohm kit is not automatically cheaper to run, despite its bigger battery, since it burns through charge and liquid faster per puff. Ahead of the October 2026 duty rise, the honest comparison is puffs per full 2ml pod, not mAh on the box.
Vape Kit Spec Sheet Suitability Matrix: Which mAh, Ohm and mg Combination Suits You?
Nobody publishes this matrix plainly, so here it is: vaper profile matched to a spec range, with the reasoning and who it is wrong for made explicit.
| Profile | Recommended ohms | Recommended mAh | Recommended mg | Wrong for |
|---|---|---|---|---|
| Light or social smoker, up to 10/day | 1.4 to 1.6, MTL | 500 to 650mAh | 10 to 20mg | Anyone wanting big clouds or a lung hit |
| Moderate smoker, 10 to 20/day | 1.2 to 1.4, MTL | 650 to 900mAh | 20mg salt | Anyone who dislikes a tight, restricted draw |
| Heavy smoker, 20+/day | 1.0 to 1.2, restricted MTL | 900 to 1200mAh | 20mg salt | Anyone who charges rarely or travels without power |
| Flavour chaser / existing DTL vaper | 0.6 to 0.8, sub ohm | 1000 to 1500mAh+ | 0 to 10mg shortfill or low mg salt | New quitters wanting a cigarette like feel |
| Ex smoker on nic salts, several months in | 1.0 to 1.4, MTL | 650 to 1000mAh | 10 to 20mg, often stepping down | Anyone still craving a strong throat hit at 20mg |
Reading a Vape Spec Sheet for MTL vs DTL: Which Ohms Actually Suit Your Draw?
Once you know your rough profile from the matrix above, ohms is the fastest way to sort a shortlist. At 1.0 ohm or above with restricted airflow, a kit is built mouth to lung: tight, lower running cost. Below 1.0 ohm with open airflow, it is direct to lung: looser, more vapour, higher running cost. Our pod kit range spans both bands, and ohms is a faster filter than the marketing copy, since it is engineering fact rather than a sales pitch.
A common mistake is choosing on puff count or mAh alone without checking MTL or DTL, then being disappointed when an airy sub ohm draw feels nothing like a cigarette, or an MTL kit feels too restrictive for someone wanting a lung hit.
Who a High mAh, Low Ohm Vape Kit Spec Sheet Isn't For
A big battery and a sub ohm coil are not a universal upgrade. A light or first time switcher wanting a cigarette like feel will likely find a 1200mAh, 0.6 ohm, wide open kit harsh, oversized and wasteful, moving far more vapour and liquid per puff than the habit needs. If discretion matters, a visible cloud is the opposite of what you want, and the extra mAh does not even guarantee longer runtime, since a thirstier coil can outpace a smaller, frugal one.
Equally, a flavour chasing DTL vaper who buys a small 1.2 ohm MTL kit for its huge puff count claim will likely find the draw too tight. Matching ohms to draw preference matters more than matching mAh to a headline number.
What Goes Wrong When Vape Kit Specs Are Mismatched: Failure Modes
Several problems trace back to spec sheet numbers misread:
- Assuming higher mAh always means more puffs. A 1200mAh sub ohm kit can deliver fewer puffs per charge than a 500mAh MTL kit, since wattage and ohms decide the cost per puff, not battery size.
- Vaping 20mg nic salt through wide open, low resistance airflow built for shortfills. This typically produces a harsh hit and light headedness, since sub ohm setups deliver far more vapour per draw at the same mg.
- Ignoring the 2ml and 10ml legal caps on grey market listings. A product claiming a size above these limits is not TPD compliant, and carries no quality assurance.
- Fast charging with an unrated adapter, or leaving a device on charge unattended. Protection circuits are built around a specific current; a mismatched charger is a genuine safety issue.
- Buying purely on the puff count sticker. The headline number often describes the whole kit with spare pods, not one charge on one pod, so wildly different claims can perform almost identically once mAh, ohms and wattage are compared.
Common Vape Spec Sheet Myths: mAh, Puff Count and Ohms Mistakes
Myth: a bigger mAh number is always the better buy. Not once wattage and ohms are factored in; a bigger battery feeding a thirstier coil can run out sooner than a smaller one feeding a frugal coil.
Myth: a higher puff count sticker means better value. It often describes the whole kit as sold, spare pods included, not what one 2ml pod delivers, so it is not like for like unless you check what is bundled.
Myth: lower ohms means a "better" vape. Lower ohms simply means a different style, direct to lung rather than mouth to lung. Neither is superior; they suit different preferences.
Myth: 20mg is automatically the harshest option. Perceived strength depends on how much vapour reaches your throat, governed by ohms and airflow, not mg alone. The same liquid feels very different through a restricted MTL coil than an open sub ohm one.
Vape Kit Spec Sheet Legal Limits: UK mg, ml and Duty Rules to Know for 2026
Of the numbers on a UK vape kit spec sheet, only two are capped by law: mg and ml. Nicotine strength is limited to 20mg/ml, pod capacity to 2ml, and refill bottles to 10ml, under Regulation 36 of the Tobacco and Related Products Regulations 2016 and current UK e cigarette regulations for consumer products guidance. mAh, ohms and wattage carry no regulatory ceiling; they are engineering choices, exactly why two compliant kits can have wildly different puff counts from an identical pod.
Two dates matter here. Since 1 June 2025 it has been illegal to sell single use disposable vapes in the UK, nicotine or not. And from 1 October 2026, the Vaping Products Duty adds £2.20 per 10ml of liquid, plus VAT, regardless of nicotine content, changing the cost side without changing the technical figures.
Vape Kit Spec Sheet Real Buyer Scenarios: Matching mAh, Ohms and mg to Real Life
Two months off cigarettes, previously a 20 a day smoker. Choosing between a 650mAh, 1.4 ohm MTL kit and a 1200mAh, 0.6 ohm sub ohm kit at the same price, the MTL kit is the closer match: a cigarette like draw and a full day's puffs from one charge, while the sub ohm kit needs an afternoon top up and a harsher hit than most recent quitters want.
A weekend festival with no charging point for two days. Battery headroom matters more than draw style. A second, fully charged kit beats chasing one big mAh figure; something in the style of our Gold Bar XL prefilled pod kit review as a spare covers the gap one mAh figure cannot.
A night shift worker who vapes discreetly between breaks. Low key puffs matter more than cloud size, so a restricted 1.2 to 1.6 ohm coil at modest wattage suits this far better than an attention drawing sub ohm setup.
Planning spend ahead of the 1 October 2026 duty rise. Real cost per puff, using the arithmetic above, is the fair way to compare kits once duty adds a fixed cost per 10ml. Comparing our Titan X 10K vape kit review against both worked examples is a reasonable start.
Is a Higher mAh, Higher Puff Count Vape Kit Spec Sheet Always the Better Buy? Our Verdict
Our view: no, treating mAh or puff count as the deciding figure is the single most common reason a new kit ends up unused. Ohms, and whether it suits MTL or DTL, matters more for day to day satisfaction than either headline number. For most ex smokers on 10 to 20 a day, we would steer toward a mid range MTL kit at 1.2 to 1.4 ohms and 650 to 900mAh over a bigger sub ohm alternative, since the worked figures and draw style both suit that habit better. For an established DTL flavour chaser, a sub ohm big puff kit remains the right call, and a refillable pod kit with your own shortfill is a genuine, often cheaper alternative once the October 2026 duty changes the maths. No single number settles this alone; ohms and wattage, read against your own draw preference, do.
Vape Kit Spec Sheet FAQ: mAh, mg, ml and Ohms Questions Answered
Q1 What does mAh mean on a vape kit spec sheet?
mAh stands for milliamp hours, a measure of a battery's electrical charge. A higher mAh generally means more puffs between charges, but only once you also know wattage and ohms, since a low resistance coil drains a big battery faster than a high resistance one drains a small one.
Q2 What is a good mAh for a vape kit?
For most ex smokers on 10 to 20 a day, 500mAh to 900mAh on an MTL kit is typically enough for a full day. Big puff sub ohm kits usually carry 1000mAh to 1500mAh or more.
Q3 What does mg mean on a vape and what is the UK limit?
mg means milligrams of nicotine per millilitre of e liquid. UK law caps nicotine containing e liquid at 20mg/ml; any product claiming more is not compliant.
Q4 Why do all UK vape pods only hold 2ml?
UK regulations cap pod capacity for nicotine containing e liquid at 2ml across every brand, which is why swappable replacement pods, not one large tank, are the standard way kits extend run time.
Q5 What ohms should a beginner vape kit have?
Most beginners do best on 1.0 ohm or higher, often 1.2 to 1.6 ohms, with restricted airflow, giving a tighter, cigarette like mouth to lung draw. Below 1.0 ohm is generally sub ohm, direct to lung territory, aimed at bigger vapour.
Q6 Does higher wattage on a vape kit spec sheet mean more vapour?
Generally yes, within the range the coil is built for. Wattage and ohms are linked by resistance, so a printed wattage range only means much when read alongside its matching ohms.
Q7 Are advertised puff counts on vape kit boxes accurate?
They are typically manufacturer estimates from a standardised lab puff length and interval, not a guarantee of real world use. Treat the printed figure as a rough ceiling, not a promise.
Q8 How long does a vape kit battery last on one charge?
It depends on mAh, wattage and ohms together. As an illustrative example, a 500mAh MTL kit at around 10W on 1.2 ohms delivers roughly 340 to 370 puffs per charge, while a 1200mAh sub ohm kit at around 19W on 0.6 ohms delivers fewer, since each puff draws far more power.
Q9 Why does the Vaping Products Duty affect a vape kit spec sheet?
From 1 October 2026, a duty of £2.20 per 10ml of vaping liquid applies, plus VAT, regardless of nicotine content. Since every legal pod is capped at 2ml, this attaches a fixed cost to every ml figure worth factoring into cost per puff comparisons.
Q10 What is the difference between mAh and mg on a vape spec sheet?
mAh measures the battery's charge capacity and has nothing to do with nicotine. mg measures nicotine strength, in milligrams per millilitre. One describes hardware, the other describes liquid.
Q11 Can a smaller mAh battery outlast a bigger one on the same vape kit spec sheet?
Yes, if paired with a higher resistance, lower wattage coil. A 500mAh MTL setup at around 10W can produce more puffs per charge than a 1200mAh sub ohm setup at around 19W, since the sub ohm coil draws roughly double the power per puff.