The best mini air coolers, compared.
Top pick: Yearninglife 500 ml touch cooler Best value: LENGDENG 500 ml USB cooler – Highest value block, at about £19.99, with 3.7 from 28 reviews and a stated 500 ml tank and 5 V line. Updated 20 October 2026.
A mini air cooler on amazon.co.uk is usually a desk fan with a small water tank, sold as a personal cooler, a misting fan, or a mini air conditioner. It does not use refrigerant and it does not send heat outside, so it will not lower the temperature of a whole room the way a portable air conditioner does. Any cooling you feel comes from evaporation, cold water or ice, and air on your skin, and only the person in the stream notices it. Stated tanks run from 450 ml to 700 ml, and most star lines sit between 2.6 and 3.8. What to check first is in the [personal air cooler buying guide](/hub/cooling/mini-air-cooler/sub/mini-air-cooler-buying-guide). These scores are listing evidence, not a measured room-temperature drop. The person sitting in the stream is the one who feels it.
A mini air cooler on amazon.co.uk is usually a desk fan with a small water tank, sold as a personal cooler, a misting fan, or a mini air conditioner.
42 products checked · 68 hrs invested · +24,600 readers
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Personal buying guide
Question 1 of 2
Where will you use it?
The Yearninglife listing is a 500 ml cooler at £20.79 with two speeds, two mist outlets, a timer up to 10 hours, a claimed 90° aim, and a child lock in the bullets. The bullets say USB, including a power bank, while the specification table says 220 V and 50 W, and the size cell prints 10 × 5 × 10 cm next to a weight of 900 g. Across 4.7 from 3 amazon.co.uk ratings, the file contains one UK review text, which says the unit is smaller than expected and is doing the job so far. The bullets also say essential oils can be added, which other brands in this set tell you not to put in the tank. A 30 dB figure is listed. The star line is the highest in the set, and three ratings cannot outweigh a voltage clash you would have to resolve before you plugged anything into a UK socket.
Pros
Cons
Best for: You can confirm the real voltage before you pay, and you accept a sample of three.
Less suitable: You want a power line that agrees with itself, or a review count above a handful.
Specifications
Common questions
Is it USB or 220 V?
The bullets say USB, including a power bank. The specification table says 220 V and 50 W. The file does not resolve that clash.
Can you add essential oils?
The bullets say oils can be added. That is this listing only. Other brands in the set tell you not to put oil in the tank.
How solid are the 4.7 stars?
The listing line is 4.7 from 3 ratings. The file contains one UK review text, which says the unit is smaller than expected and is doing the job so far.
The YZMML AF001 is a USB-C desk cooler at £38.99, 9 × 21 × 26 cm and 705 g, with a 600 ml top-fill tank, three speeds, a 1/2/3 hour timer, and mist from one, three, or five nozzles. The listing states 5 V and 10 W, no battery, and a box that includes a UK plug adaptor, a USB-C cable, two felt pads, and a manual. The bullets say the fan and the mist can run separately, that oil goes on the felt pad rather than in the tank, and that you need a supply of 2 A or higher when fan, mist, and light run together. Across 3.8 from 36 amazon.co.uk ratings, reviews say you need to be near it, one calls it overpriced next to similar units around £15, and the nozzle may need wiping to keep misting. A 40 dB figure is listed. It is the top pick in this comparison because the power, the tank, the adaptor, and the separate mist control all appear on the same page, which the cheaper rows do not manage, even though £38.99 is the highest price here and the cool air still only reaches the person in front.
Pros
Cons
Best for: You want the clearest UK desk spec in this set and you will sit in the stream.
Less suitable: You need a battery, a room cooler, or the lowest price in the comparison.
Specifications
Common questions
Can you run it as a fan with the mist off?
The bullets say the fan and the mist can be used independently. Oil goes on the felt pad, not in the tank.
Does it include a UK plug?
Yes. The box list is a USB-C cable and a UK plug USB adaptor. There is no built-in battery, so it has to stay powered.
How far does the cooling reach?
Reviews say you need to be near it. One calls it overpriced next to similar units around £15, and photos larger than the object. The nozzle may need wiping to keep misting.
The Mldnld fs-888 is a USB rechargeable cannon-barrel mist fan, 14.8 × 21.5 × 12 cm and 520 g, with a 450 ml tank and a 3/6/9 hour timer, at £9.99. The listing says 1 W and cordless, and it does not state a milliamp-hour capacity. The speeds cell prints 100, which is a listing figure rather than a short set of steps you can plan around. Across 3.8 from 8 amazon.co.uk ratings, one review says you hold the orange button for mist and twist the tank off, and that the printed manual was safety text rather than use steps. The same small sample includes a note that the fan is noisy even on the lowest speed and was not usable overnight, despite a silent claim with no decibel figure. Ice and aiming are not stated. Eight ratings are too few to treat the 3.8 line as settled, and the unit will not cool a room.
Pros
Cons
Best for: You want the cheaper-looking fs-888 for a short personal mist and you can live with eight ratings.
Less suitable: You need a stated battery life, overnight quiet, or air across a room.
Specifications
Common questions
Does this Mldnld fan have a battery?
The listing says it is USB rechargeable and cordless. It does not state a milliamp-hour capacity.
How do you start the mist?
One UK review says you hold the orange button for mist and that the tank twists off. The printed manual was described as safety text rather than use steps.
Is it quiet enough overnight?
The listing says silent and gives no decibel figure. One of eight ratings says the fan is noisy even on the lowest speed and was not usable overnight.
The LENGDENG is a USB evaporative cooler at £19.99, listed at 5 V and 8 W, with a 500 ml tank, three speeds, and a 7-colour light that can stay fixed or shift. The page suggests cold water or ice and claims 6–8 hours with ice, and it says the unit keeps blowing as a fan when the water is low. Across 3.7 from 28 amazon.co.uk ratings, one buyer writes that it is an air cooler, not an air conditioner, and that the cool air was better than expected for the price, while another returned it as not quiet enough to sleep. A review says there is no low-water warning and that the level is hard to see. Noise is 30 dB in the table and under 45 dB in the bullets, so the quieter figure is a claim with a second, looser line beside it. It is the best value in this comparison because a stated 500 ml tank and a 3.7 line from 28 ratings sit at £19.99, if you can live without a timer in the table and you sit in the stream.
Pros
Cons
Best for: You want a readable 500 ml desk cooler around £20 and you will check the water yourself.
Less suitable: You need a timer, overnight quiet, or a UK adaptor listed in the box.
Specifications
Common questions
Is the 45–50°F drop a measured result?
That figure is in the bullets only. The file has no test method, room size, or humidity.
What happens when the tank is empty?
The bullets say it keeps blowing air. A review says there is no warning and that you have to watch the level, which is hard to see.
Does a review call it an air conditioner?
One buyer writes that it is an air cooler, not an air conditioner, and that the cool air was better than expected for the price. Another returned it as not quiet enough to sleep.
The GuyAna is a USB desk cooler at £33.99, 16.5 × 16.5 × 24 cm and 930 g, with three speeds, an ice compartment, a 7-colour light, and 40 dB in the table. Wattage and tank millilitres are not stated, and reviews cite a short USB-A to DC lead. Across 3.4 from 72 amazon.co.uk ratings, texts include units that died within days or months, a USB plug too hot to touch, a loose power socket, and a UK note that limescale clogs the atomiser. A review says the ice compartment is not a closed box, so melt water can overflow, and others report the mist spitting onto whatever is in front. The title says noiseless beside the 40 dB cell. Paying £33.99 puts it near the top of this set’s prices without a cleaner specification than the £20 units, and a hot plug is a reason to unplug rather than to keep experimenting.
Pros
Cons
Best for: You want an ice tray on the desk and you will watch the fill and the plug.
Less suitable: You want a sealed tank, a stated wattage, or fewer notes about units dying.
Specifications
Common questions
Does the ice compartment stay sealed?
A review says it is not a closed container, so melt water can overflow the tank. Another says not to overfill if you use ice.
Is it noiseless?
The title says noiseless and the table says 40 dB. Reviews include both quiet use and a report that it is not noiseless.
What broke?
Review texts include units that died within days or months, a USB plug too hot to touch, a loose power socket, and a UK note that limescale clogs the atomiser.
The DVDVBOOM unit is a 200 g USB evaporative cooler, 6 × 14.4 × 19.2 cm, with three speeds, two mist levels, a 7-colour light, and a storage bag in the title, at £18.49. Wattage and tank millilitres are not stated, and there is no battery in the bullets, so hoseless here means a small water tank rather than a portable air conditioner. Across 3.4 from 7 amazon.co.uk ratings, one verified review says it leaked constantly through the spray holes and that a button sticker was poorly fitted, and another says the water runs out quickly. An efficiency field prints A, with no refrigerant in the table. The head is claimed to turn through 360°. Seven ratings and a leak note are a thin reason to pay more than the £9.99 misters in this set.
Pros
Cons
Best for: You want a very small USB mister with a bag and you will watch for leaks on day one.
Less suitable: You need a stated tank, a larger review sample, or a unit that reviews say stays dry.
Specifications
Common questions
Does hoseless mean it is a portable air conditioner?
The title says no water hose and no outdoor unit. Power is USB. There is no refrigerant or compressor in the specification table.
How long does the tank last?
Capacity is not stated. One of seven ratings says the water runs out quickly.
Does it leak?
One verified review says it leaked constantly through the spray holes and that a button sticker was poorly fitted.
The Mr.Pufferfish cooler lists a 700 ml tank, three speeds, a 2/4/6 hour timer, a 7-colour light, and a Type-C cable, at £21.42 and 600 g. Reviews say it must stay plugged in, while the table says 220 V and 7 W, and the height cell prints 211 cm beside that 600 g weight. Across 3.2 from 159 amazon.co.uk ratings, several texts say water and ice produced no spray, while others say mist plus ice feels cooler at close range. Noise is given as 1 sone in the table and as both under 30 dB and under 55 dB in the bullets. The title carries Energy Class A+, with no label image, refrigerant, or SEER in the file. The 700 ml tank is the largest stated volume here, and the broken height cell plus the missing-mist notes keep it off the short list.
Pros
Cons
Best for: You want the biggest printed tank and you will test the mist on the first fill.
Less suitable: You need the power and size cells to agree, or a spray that reviews consistently describe.
Specifications
Common questions
Does Energy Class A+ mean a UK air-conditioner label?
A+ appears in the title. The file has no label image, refrigerant, or SEER. Power in reviews is USB.
Why do reviews say there is no mist?
Several of the 159 ratings say water and ice produced no spray. Others say mist plus ice feels cooler at close range.
Is the height 211 cm?
That is the figure in the specification table, next to a weight of 600 g. Treat 211 cm as an unbroken listing cell, not a checked measurement.
The HomHou OMG is a USB evaporative cooler at £19.99, with a 500 ml top-fill tank, three speeds, a listed weight of 500 g, and a noise line of 45 dB, while the bullets say under 45 dB. The bullets also say cordless and rechargeable, and that the pad rinses under the tap with no tools. Across 3.1 from 17 amazon.co.uk ratings, a verified review says it is not truly cordless and docks a star for that. One review in humid weather felt no difference versus a normal fan, even with ice water, while another was happy with the breeze. Cleaning is described as messy, and the water line as hard to see. A timer is mentioned in one review and is not in the table. The 500 ml tank matches the LENGDENG on paper, and the cordless clash is why this listing sits lower.
Pros
Cons
Best for: You want a 500 ml pad you can rinse, and you will treat the cordless line as unproven.
Less suitable: You need a battery you can trust, or the 3.7 line on the other 500 ml unit.
Specifications
Common questions
Is it really cordless?
The bullets say cordless and rechargeable. A verified review says it is not truly cordless and docks a star for that.
Can the pad be rinsed?
The bullets say the internal filter and cooling pad come out and rinse under the tap with no tools. One review says cleaning is messy and the water line is hard to see.
Did ice water make it colder than a fan?
One review in humid weather felt no difference versus a normal fan, even with ice water. Another was happy with the breeze.
The white DAOLIGI ACF01 is a corded USB mister at £12.99, listed at 5 V and 5 W, with three speeds, a 1/2/3 hour timer, and a claimed 360° aim. The box line is a USB Type-C cable only, so this colour has no mains adaptor and no battery. Across 2.9 from 268 amazon.co.uk ratings, the largest sample in the set, review texts cite early failure, a connector pulling out, a burning smell, leaks from the charging port, and airflow that only helps up close. Tank millilitres are not stated, though ice cubes and a 2.5–12 hour runtime appear as claims. An efficiency field says A+++, and the file has no energy-label image, refrigerant, or SEER. The rank sits in Mobile Air Conditioners, which does not make it a compressor. The failure pattern in a large review file is the limit, even though the 5 V line itself is readable.
Pros
Cons
Best for: You want the white ACF01’s stated 5 V line and you will sit in the stream.
Less suitable: You need a UK adaptor in the box, a battery, or a unit without a large failure cluster.
Specifications
Common questions
Does the white DAOLIGI include a mains adaptor?
Included components list a USB Type-C cable only. The black ACF01 listing is the one that also names an adaptor.
Is the A+++ mark an air-conditioner energy label?
The table field says Efficiency A+++. The file has no energy-label image, refrigerant, or SEER.
What failed in reviews?
Among 268 ratings, review texts cite early failure, a connector pulling out, a burning smell, leaks from the charging port, and airflow that only helps up close.
This second Mldnld fs-888 listing, also £9.99, adds an 1800 mAh claim, 35 dB, a 90° tilt, and UPC 780159964834, at 580 g with the same 450 ml tank and 3/6/9 hour timer. The airflow cell prints 1 m³/h, which is not a useful breeze figure for a fan, and the speeds cell again prints 100. Across 2.7 from 12 amazon.co.uk ratings, several reviews say the mist does not work and that no instructions were included, and one says the mist is sucked back into the fan. The bullets claim an auto shut-off when the water runs out, which the review texts in the file do not confirm. It shares the model number with the other fs-888, so the extra battery line is not a second product you can verify from the stars. At the same shelf price as the 3.8 listing, the lower star line and the missing-mist notes are the reason to skip it.
Pros
Cons
Best for: You already prefer this UPC and you will return it if the mist never starts.
Less suitable: You want the stronger of the two cheap fs-888 star lines, or reviews that say the spray works.
Specifications
Common questions
Is this the same unit as the other Mldnld fs-888?
Both listings use model fs-888. This ASIN states 1800 mAh, 35 dB, and UPC 780159964834. The other does not state milliamp-hours and has a different UPC.
Does the mist shut off when the tank is empty?
The bullets claim an auto shut-off when the water runs out. Reviews in the file do not confirm that behaviour.
Why might there be no mist?
Several of the 12 ratings say the mist does not work and that no instructions were included. One says the mist is sucked back into the fan.
The black DAOLIGI ACF01 is the same model number at the same £12.99, listed at 10 W rather than 5 W, with dimensions of 21 × 10 × 27 cm and a weight of 540 g. This colour’s box line adds a mains adaptor to the USB Type-C cable, plus a 7-colour light, three speeds, a 1/2/3 hour timer, and a claimed 360° aim. Across 2.6 from 230 amazon.co.uk ratings, review texts say you need to sit next to it, and several call the airflow very weak. A review notes there is no rechargeable battery, and tank millilitres are still missing. The bullets claim a drop to 55–50°F, which is not a test in the file. The adaptor is the practical difference from the white listing, and the lower star line is why this colour does not become the better ACF01 by default.
Pros
Cons
Best for: You specifically want the black ACF01 because the adaptor is listed.
Less suitable: You wanted a cordless cooler, a stated tank, or the 2.9 line on the white listing.
Specifications
Common questions
How is this black unit different from the white ACF01?
Both use model ACF01 at £12.99. This listing states 10 W, a 7-colour light, and a cable plus adaptor. The white listing states 5 V and 5 W and a cable only.
Will it cool a room?
Review texts say you need to sit next to it. Several call the airflow very weak. The bullets claim a drop to 55–50°F. That figure is not a test in the file.
Does it have a battery?
The listing is corded USB. A review notes the lack of a rechargeable battery. Tank millilitres are not in the specification table.
The Ashloter is listed at £21.99 as a rechargeable mister with five speeds, three outlets, a 0.5 litre tank, a 3/6 hour timer, and a manual tilt. The table then says 120 V and 15 W, the dimensions print as 120 × 22 × 80 mm, and the weight is 120 g. No UK 13 A plug is listed, and battery runtime is not stated, because the 0.5 litre figure is water rather than milliamp-hours. The amazon.co.uk line is 1.0 from 1 rating, and the saved listing has no UK review text, so there is no written reason for that star. A 20 dB claim and an A+++ efficiency field sit on the same page without a test method. At more than £20 it is the weakest evidence in the set, and the 120 V cell is a UK buying problem.
Pros
Cons
Best for: You are only using this row as a warning about a 120 V cell on a USB-style mister.
Less suitable: You need a UK adaptor, a written review, or any unit with more than one rating.
Specifications
Common questions
Will it run from a UK mains socket?
The bullets describe a built-in battery. The table says 120 V and 15 W. No UK 13 A plug is listed.
How long does the battery last?
Runtime is not stated. The capacity field is 0.5 litres of water, not a battery capacity.
What do buyers say?
The listing line is 1.0 from 1 rating. The saved listing has no UK review text, so there is no written reason.
For this comparison we read twelve mini air cooler listings on amazon.co.uk, dated 20 October 2026, and scored them from those listing figures and the review notes already in the files. This is not a laboratory test. We did not measure a temperature drop, a decibel level, or airflow. Weights sum to 100. An A+ or A+++ cell is not scored as an energy label, because none of the listings states a refrigerant.
Amazon evidence
35%Star points are the listing line divided by 5, then multiplied by 26, plus a volume band. Under 20 ratings adds nothing, 20–99 adds 2, and 100–499 adds 6. The block is capped at 35, so 4.7 from three ratings cannot outscore a mid-3 line with a larger sample on this block alone.
UK listing fit
30%Three parts of 10 cover power, tank and controls, and whether size, noise, and an air-conditioner class agree. A clear 5 V USB line scores higher than a cordless claim beside a cable, or a 120 V or 220 V cell against USB bullets. A hard contradiction in size, or an air-conditioner class with no refrigerant, pulls the spec part down.
Review notes
20%A larger sample with a named everyday limit, such as air that only helps up close, scores higher than a hard-failure cluster. Burning, port leaks, early failure, missing mist, and a cordless claim a review rejects all pull this block down. One rating with no review text sits at the bottom of the band.
Price credibility
15%This is the value block, capped at 15. The highest score on a different ASIN from the top pick is the best value. A £19.99 listing with 3.7 from 28 ratings and a stated 500 ml tank leads this block. The dearest row does not.
Start with the job, then the humidity, then whether the volts on the page agree with the bullets. A title that says mini air conditioner is not a refrigerant circuit. A Fahrenheit drop in a bullet is not a test in these files. Decibel cells are seller-entered. You usually have to sit in the stream. A lid you can empty matters more than another light colour, because limescale and standing water stop the mist.
A mini air cooler on amazon.co.uk is usually a desk-sized fan with a small water tank. Sellers also call it a personal cooler, a misting fan, or a mini air conditioner. It does not use refrigerant and it does not reject heat outside, so it will not lower the temperature of a whole room the way a portable air conditioner does. Cooling, when it happens, comes from evaporation, from cold water or ice, and from air moving over skin. The person sitting in the stream is the one who feels it.
These boxes spray or evaporate water and move air over skin. They do not send heat outside. Trusted Reviews’ outlet-air range is a class description, not a result for a 5 W USB fan. If the thermometer in the room has to fall, you are in a different category.
Yearninglife’s bullets say USB, including a power bank, and the table says 220 V and 50 W. Ashloter’s table says 120 V. Mr.Pufferfish reviews describe a Type-C lead that has to stay in, while the table says 220 V. A 120 V or 220 V cell is not a UK 13 A rating when the bullets say USB. UK mains are 230 V.
Standing water and limescale stop the mist. A UK note on the GuyAna says limescale clogs the atomiser. Empty the tank when you stop. Do not soak a laptop with the spray, and do not aim the stream straight at your body for long. If an adaptor smells or heats the socket, unplug it and get an electrician.
Prefer a stated 5 V USB supply. The YZMML, at about £38.99, includes a UK plug adaptor and says there is no battery, at 5 V and 10 W. The LENGDENG states 5 V and 8 W. Both Mldnld listings at £9.99 say USB rechargeable. Only the 1800 mAh listing states a capacity. The black DAOLIGI adds a mains adaptor. The white DAOLIGI lists a USB Type-C cable only, at 5 V and 5 W. Treat a clash as a reason to leave the listing. Yearninglife’s bullets say USB while the table says 220 V and 50 W.
Stated tanks are 450 ml on both Mldnld listings, 500 ml on the LENGDENG, the HomHou, the Yearninglife, and the Ashloter, 600 ml on the YZMML, and 700 ml on the Mr.Pufferfish. The DAOLIGI colours, the DVDVBOOM, and the GuyAna do not state millilitres. A 6–8 hour line or a 2.5–12 hour line is a seller claim, not a runtime we timed. The YZMML prints a 1/2/3 hour timer, the Mldnld pair prints 3/6/9 hours, and the Yearninglife prints steps up to 10 hours. The LENGDENG has no timer in the table.
Three typical situations, each with a recommendation from this comparison.
You will sit in the stream and you want the power, the tank, and the plug to agree. The YZMML AF001 is the top pick: 5 V and 10 W, a 600 ml tank, a UK plug adaptor, and fan and mist controls that can run separately, at about £38.99 with 3.8 from 36 reviews. There is no battery.
You want a readable 500 ml desk cooler without the top price in the set. The LENGDENG is the best value: 5 V and 8 W at about £19.99, with 3.7 from 28 reviews. There is no timer in the table, and one review says the water level is hard to see.
You want the stronger of the two £9.99 fs-888 star lines. The Mldnld cannon listing is USB rechargeable, with a 450 ml tank and a 3/6/9 hour timer, at 3.8 from 8 reviews. Milliamp-hours are not stated, and one of those eight ratings calls it noisy on the lowest speed.
The YZMML AF001 is the top pick because it scores 71: 5 V, a 600 ml tank, a UK adaptor, and separate fan and mist controls, at about £38.99 with 3.8 from 36 reviews. The LENGDENG is the best value. It has the highest price-credibility score, at about £19.99, with 3.7 from 28 reviews and a stated 500 ml tank, if you can live without a timer in the table. The two rows that both score 52 do not take a badge. None of these twelve is a refrigerant air conditioner.
LENGDENG 500 ml USB cooler
Highest value block, at about £19.99, with 3.7 from 28 reviews and a stated 500 ml tank and 5 V line.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public UK sources used for this comparison, last reviewed on 20 October 2026. Listing prices, stars, and specifications are from the amazon.co.uk pages for these twelve ASINs.
Expert source (DIY & tools): Charlie White (Charlie DIYte) (external profile) – public expert commentary used as a research source, not as a contributor to our pages.
This page contains affiliate links to amazon.co.uk. If you buy through them, we may earn a commission at no extra cost to you. Scores use the listings and public UK sources named below. They are not a laboratory test.
