The Innokin Cool Fire mini looks set to add to the rise of the ‘mini mods’. Or so it appears judging from the sheer amount of tiny stealth vaping nano mods currently on the market.

As a long time user of Innokin’s Coolfire series – to get my hands on the much awaited Innokin Coolfire Mini 40W with the Slipstream tank – was I have to say exciting.

cool-fire-mini ace

For our American friends I’m pretty sure the Coolfire Mini is known as the Coolfire Ace – anyway that’s what Google tells me 😉

Introduction: The Much Anticipated Coolfire Mini From Innokin

Ok given I have relegated my Coolfire IV TC 100 to my desk mod [the Pebble has taken over as my out and about mod] – could the Mini and Slipstream prize the Pebble from my pocket?

Let’s take a good look under the Mini – as we used to say in the sixties.

In The Box

innokin coolfire min / ace

First glance and I thought this was a multipack of cigarettes – particularly as a third of the front is taken up with the dire warning – ‘This Product Contains Nicotine Which is a Highly Addictive Substance’.

I could argue that [a] no it doesn’t until it’s filled [b] and anyway some folks might use 0mg nicotine…but I won’t. Instead I’ll just carry on muttering lines such as ‘the world’s gone mad’ – ‘nanny state’ and such like whilst I write – a kind of mild Tourette’s review if you like.


Anyway – the rest of the packing is functional with the contents and scratch n sniff code on the back – and just to add one of my own warnings – the edges of the cardboard are extremely smooth so no chance of paper-cuts…but if at all concerned at such danger wear protective gloves and goggles… ‘nanny state’…mutters….

Inside you’ll find:

  • X1 Coolfire Mini Battery
  • X1 Slipstream Tank
  • X1 Extra coil [0.8 Kal]
  • X1 Micro USB charging cable
  • X1 User manual
  • X1 replaceable stainless steel drip-tip
  • X2 Innokin stickers

Coolfire Mini/Ace Specs

  • 63mm tall [without the Slipstream tank]
  • 42mm wide
  • 510 gold plated spring loaded connection
  • Voltage range of 3.0 to 7.5 volts
  • Variable wattage range of 6.0 to 40 watts – adjustable in .5 watt increments
  • Can pass-through vape – vaping whilst charging

Key Features

Regular users of the Coolfire series will already be familiar with the key features – and the Mini is pretty much identical in every aspect.

Let’s run through a few.

First up is its size – the Mini is exactly that it’s tiny and about 2/3rds the size of the Coolfire TC 100.


It’s considerably lighter too despite having a 1300mAh internal battery.

The Innokin Coolfire Mini can be operated in both variable voltage and wattage mode each of which allows you to set your preferred vape settings to the ‘unth degree.

Once set the chip recognizes and remembers your settings.

Innokin has packed in a whole host of safety features too including low voltage warning – short circuit protection – overheat protection and over discharge protection.

The device also cuts out if the fire button is held down for longer than 15 seconds – handy if it’s in your bag or pocket.

Though on a serious note – for a change – when not in use and particularly in your pocket or bag – DO turn any vaping device OFF for obvious reasons.

Operating the Coolfire Mini

  • X3 clicks turns you on and off
  • Hold + & fire button for two seconds to enter variable wattage mode
  • Hold – & fire button for 2 seconds to enter variable voltage mode
  • Both settings can be increased and decreased using the + & – buttons
  • Hold = & – buttons for 3 seconds to flip the screen
  • The Coolfire Mini OLED screen also displays the battery reading
  • Green = almost fully charged
  • Yellow = Half power
  • Red = Low power


Innokin say if the Coolfire Mini is reading below two bars on the battery indicator re-charge immediately – it could screw up your device and possibly void your 90 day warranty.

The Slipstream Tank

We’ve pretty much covered the Slipstream tank a couple of times – suffice it to say it is not only a nice looking piece of kit – it performs well too.

innokin slipstream tank

I have to say it does look like it was made for the Coolfire Mini looking fantastic together.

Of course the Mini can take over tanks thanks to the 510 connection so if 2mls is too little for you then a larger tank fits with no issues.

Checkout our reviews which include the Slipstream here:

Pebble and Slipstream and the iTaste Kroma

Design and Build Quality

I received the stainless steel and black version – the Coolfire Mini is also available in pink – purple and blue.

The build is first rate with that brushed metal look. The fire button curves over the top of the mod which is a nice design touch.


The screen though tiny is crystal clear and all three buttons are responsive with no annoying rattle.

The usb is on the side – which of course means it stands up whilst charging and you can vape whilst it’s powering up – though the lead is a little small lol.

Of the two I received I felt the black was a lovely thing to handle – however for me anyway the stainless steel version felt a little lightweight – I dunno just a personal thing but the stainless steel version felt a little ‘cheaper’ than the black one.

The battery venting comes in three varying sized cut-outs on the top and bottom – they stand out far more on the lighter models adding both a safety and nice looking design touch.

All in all it’s the Coolfire shrunk down with a few little touches such as the fire buttons curve and the + and – buttons horizontal rather than vertical.

Funnily enough I just read Kevin’s excellent review of the Smokjoy Air 50s Micro – and they do look very similar…very similar 😉

How Does The Innokin Coolfire Mini and Slipstream Perform?

I’ve already said the Slipstream is a great little tank and pairing it with the cute little Coolfire Mini is an inspired move – they do look bloody good together.

The fire button is extremely responsive with not even the slightest gap between hitting the fire button and getting the vape.

Altering your settings is a doddle and is lightening quick – there’s no ‘round robin’ so you need to be a little gentle.

If you’ve used any of the Coolfire mods then operating the Mini will be second nature. If you’re new to the range then there’s nothing here that will faze you.

What I like

Being a fan of all things Coolfire it goes without saying I like the Mini – especially paired up with the Slipstream tank.

It fits beautifully in your hand – seems to have a battery life that lasts forever and is compatible with all the 510 connection tanks out there.

It is – what it is – a mini version of the Coolfire…

What I Don’t Like

Struggling here…

There’s really not a lot to dislike – but I think you might have detected a kind of ‘shrug’ coming from me…

I’ll explain below…but let’s put it this way – despite being more powerful it hasn’t replaced the Pebble as my ‘out and about’ kit.

Final Review Verdict

I was of course excited to hear Innokin were adding a nano/mini version to their superb Coolfire series so it might sound daft – but that is exactly what it is!!!

innokin coolfire mini colours

Yeah the Innokin Coolfire Mini is a cute – good looking – reasonably powerful device that does all you ask of it.

I’m not even sure why I’m kinda flat after using it for a few days – it IS a Coolfire and it Is smaller – and…

Well – that’s it really.

Not sure what I was expecting if I’m honest – so putting my reviewers cap on rather than a Coolfire fanboy vest and I wouldn’t hesitate in recommending the Coolfire Mini.

I just kinda shrug when I look at it – it is was it is and does it quite beautifully if that makes any kind of sense!!!

If you have a Coolfire and want a smaller 40watt version then don’t hesitate – buy it!


If I was taking the big end off my Austin Mini engine and the Coolfire Mini dropped into the oil sump [as you can see I have no concept of car engines] would I replace it?

Yes I would – then call a mechanic.


  • Small
  • Great design
  • Variable wattage and voltage
  • Comes with the Slipstream tank
  • Battery lasts an age


  • I’ve scratched my head and can’t find any if I’m honest.
  • Some might wish it had a little more ‘ooomph’ than 40 watts maybe…
neil Humber 2
Neil Humber

I have simpler vape tastes these days - I never leave home without a Caliburn G, a Vaporesso Luxe 40 or Innokin EQ FLTR and a CBD vape pen or bottle of CBD drops in my rucksack...or indeed an Aspire Nautilus Prime X in my pocket... At home I'll be using various mods topped with the GeekVape Zeus X RTA or the Signature Mods Mono SQ topped with the Augvape BTFC RDA... I'm a former journalist and now a writer and sometimes author... I'm ex Army - adore dogs and never happier than hiking over the hills or with a good book on a beach.

Build Quality
Ease Of Use
Mod Functions
Likelihood of Replacing
I have simpler vape tastes these days - I never leave home without a Caliburn G, a Vaporesso Luxe 40 or Innokin EQ FLTR and a CBD vape pen or bottle of CBD drops in my rucksack...or indeed an Aspire Nautilus Prime X in my pocket... At home I'll be using various mods topped with the GeekVape Zeus X RTA or the Signature Mods Mono SQ topped with the Augvape BTFC RDA... I'm a former journalist and now a writer and sometimes author... I'm ex Army - adore dogs and never happier than hiking over the hills or with a good book on a beach.
coolfire-mini-slipstream-tank-reviewThe Innokin Coolfire Mini almost gets a full house from me - it's a great little stealth vaping device that looks great works great and Coolfire fans will love it.


  1. I am ex smoker switched to vaping and am using Innokin coolfire mini with Zenith D22 tank and 0.8 ohms coils. These work fine for me. Battery life could be bit better but is not a problem. I need to get a new tank and mod – only because the color on Coolfire mini mod as well as zenith tank is fading/chipping off.
    Planning for Innokin Zlide tank in Stainless Steel finish to avoid paid fading/chip off issue.

    Please can you recommend suitable mod – I need the mod to be small/compact but sturdy with simple/clean design.

    I Tried Plexus 0.50 Ohms coils but did not like them much. Would you recommend trying the new Z 0.48 coils or best to stick to 0.80?

  2. Just bought a coolfire ace. This is my first time vaping. I have no idea what setting I should use and the lady at the vape shop wasn’t very helpful. At the moment I have it on 3V and 15.5 W. It does make a little popping from time to time and I have the vent all the open cause if I don’t it burns my throat. I’m using vape cloud liquid.

    Any suggestions on settings? Other sites keep saying depends on my preference but I have no idea what my preferences even are, lol. Just want a smooth good tasting experience. Any help will be appreciated.

    • Hi Tana,

      Thanks for getting in touch.

      It is down to a little experimenting on your part and while I can’t tell you what your best setting is (we really do have different needs) I can tell you what I do when trying a new tank/coil and vape device.

      Just so you understand, vaping is a fair bit different to smoking in terms of ‘how you do it’.

      OK…Two things that I’m not sure of on your setup is your coil resistance (ohm rating on side of the coil) and the PG/VG % ratio of your e-liquid, I’ve not come across the e-liquid you have mentioned before.

      You can read more about PG and VG in e-liquid here. It will help you understand the effect different ratios can have on your vaping experience. You need to make sure your e-liquid is suitable for the coil/tank you are using.

      I’m going to presume you are using the Slipsteam Tank with the 0.5Ohm coil.

      The 0.5Ohm coil will suit 60VG/40PG and 70VG/30PG e-liquids the best.

      Also, when sub ohm vaping it’s recommended not to go over 6mg nicotine as it can be quite harsh on the throat and cause a nicotine rush. But.. Personal preference on what you can take. Me personally I use 3mg and 70VG juice for most of my sub ohm vaping for a smoother experience.

      Airflow – The wider open the cooler the vape, close it up and it will get warmer but you may also find flavour gets a touch better. I personally vape all the way open in a direct to lung style (more on that below).

      Once you have filled the tank, start on a lower wattage and work your way up 1w at a time testing as you go. This is the only way to find your sweet spot.

      For me, with a 0.5Ohm coil and a 70VG 3mg e-liquid I will vape around 25-30W depending on the flavour I am vaping at the time. yes, different flavours can react better to more/less wattage/heat.

      One last thing and maybe the most important… These tanks are designed for a direct to lung (DTL) vape rather than a mouth to lung (MTL) vape that most smokers used to do.

      It’s a different subject matter and to get a better understanding I’d suggest taking 5 minutes to read about the difference between MTL and DTL vaping.

      A lot to take in but do take a minute to read the two articles linked to.

      Once you’re up and running it’ll become second nature.

      Any other questions please let me know.



    • I only got mine to and it’s hard to know what setting to put it up to i have looked at YouTube video and all the video’s have the same setting so i just play around with it and see what one suit me.
      I konw it’s hard but if you have it up to high it burn the lips off me
      Hopefully you can find the right setting you want sorry i wasn’t any help good luck with it

  3. I have the Cool Fire Mini, and have had some issues with different Tanks and Spitting, I’m now using a Tecc Tank on it, that was until last night when it decided to pack up ,it is getting warm when plugged in to charge but nothing on the screen, I purchased this on the 8/8/2017 and Yes you guessed it, we r now just outside the 90 days

  4. For all users with spitting issues, make sure the pg to vg ratio is no lower than 20% pg to 80%vg. More vg the better. This is mainly used for cloud vaping so 50/50 blends will be problematic.

  5. Hi,

    So i have bought one of these and am using the “twelve” liquid (i’m a sucker for some good packaging), but it seems to taste burn’t, and anything over 14w makes a loud popping noise.

    Am i doing something wrong?

    Also new to this would you believe!

    • Hey James,

      Hadn’t seen Twelve e juice before but the packaging does look pretty cool! haha

      OK, I’ll do my best to help out. First I’d recommend checking out this article on troubleshooting e cig tank problems.

      Have a read over that mate for more in depth answers..

      In short it *could* be:

      – A bad batch of coils
      – The juice you have may either be having trouble soaking into the coils or it may have sweetners in it that are gunking your coils.
      If a juice doesn’t soak into your coil/cotton well then when you vape the juice doesn’t have time to feed to the cotton. So when you come to take a toot the cotton isn’t saturated enough which results in the burnt taste. Your coils are basically heating up dryish cotton. The process is known as ‘wicking’.
      – Be sure once you fill your tank to give a fresh coil 5-10 minutes to wick/soak up juice before you vape. Very important!
      – Also, once a coil cotton is burnt it’s pretty much a dead coil unfortunately. So if you keep trying to work on an already burnt coil there will be only one winner 🙂
      – When using a fresh coil start wattage low and work your way up gradually until you find your sweet spot. Start too high from the outset and your coil can ruin.

      Popping isn’t unusual and usually settles down after a bit. To try and tame this try rolling tissue paper tight and poking this down through the mouthpiece into the center of the coil to soak up any bits of juice on the actual metal coil.

      OK James. Have a look at the above and the other recommended page and let me know if you have any other questions. As mentioned, may just simply need a replacement coil.

      Let me know how you get on!



  6. My local northeast indoor stall stocks VIP brand, this is also Inc, I’m looking to replace a VIP NEXUS Mini…. Battery display is busted….But battery still lives, but with zero info!
    The full new coolfire kit with tank Nd battery ,lead in box … £37
    The guy recommended this so after last success I eagerly await purchase day… Hopefully next weekend … Had used a liquorice flavour liquid, but will get new brand n flavoured liquid…Hey no …. Give up smoking tobacco, which I can do but I miss having joint or 3 at night….

  7. I brought one from vapebuzz yesterday, I guess these may be freely available now in other places. What I am finding is that the device is spitting a lot with the supplied equipment. I’ve tried various wattages and opening up the airflow etc but it spits on every go which is unpleasant. Has anyone else had this issue?

    • Yes I have . I’ve got 2 pebbles, one works great the other is awful.
      First one has 1.52 ohm and is set at 10 W and I’m using a 12 mg juice – all good.

      The other is 0.82 Ohms and I also had it set at 10W ( as per the Bloke in the shop where I bought it). I turned up the watt to 20 which is what it said on the box the coil came in and it was still spitting and the juice started to taste awful. I changed the juice to a 6mg and set it to 20 W. It’s still spitting a bit but doesn’t taste horrid . I’m not getting much smoke though . It’s so frustrating !!!


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