Joyetech Espion Solo with ProCore Air review by Mjag...21700 goodness?

Thanks for taking the time to view my review of the Joyetech Espion Solo with ProCore Air kit which was sent to me directly from Joyetech for the purpose of this review.

Standard Configuration:

  • ESPION Solo
  • ProCore Air tank
  • AVB 21700 battery (optional)
  • 2 ProCA (0.4ohm) head
  • 18650 battery sleeve
  • QC USB cable
  • 2 Owners manual
  • Warranty card
  • Warning card
  • Spare parts


  • Mod size: 25.5mm39.5mm132.5mm (4.5ml version)

  • 25.5mm39.5mm126.0mm (2.0ml version)

  • Screen type: 1.3 inch OLED touchscreen

  • Screen size: 64*128 px

  • Output wattage: 1-80W

  • Output mode: Power/RTC/Bypass/TC(Ni, Ti, SS316)/TCR modes

  • Atomizer head: ProCA (0.4ohm) head and other ProC series heads

  • E-liquid capacity: 4.5ml/2.0ml (two versions for option)

  • Resistance range: 0.05-1.5ohm for TC/TCR mode

  • 0.1-3.5ohm for Power mode

  • Temperature range: 100-315°C/ 200-600°F

  • Cell using: single replaceable high rate 21700/18650 cell (CDR25A)

  • Max charging current: 2A

  • Max output current: 30A

  • Max output voltage: 9V

  • 4 colors available:

Espion Solo

Right off the bat the new Espion Solo reminds me of a souped up eVic VTC Mini with the added benefit of 21700 compatibility. Nice all around small mod with an intuitive touchscreen that is both bright and easy to use. Nice form factor, just like the VTC Mini but the battery cover is now rounded which adds to this being a comfortable mod to hold.

On my sample version which is sent out prior to production I did have a loose battery door, it didn’t fit right on top, had some push to it. I fixed that with a piece of electrical tape that kept the battery door all snugly wugly.

I can report that a friends Espion Solo did not have the same fit problem so it could be a production sample problem but it is easy enough to fix.

The 510 on mine is a little raised and a bit crooked, not annoyingly so but it should be mentioned that some tanks will have a gap. It is not on all tanks but enough to deserve mention. Here is a pic showing the gap with the Procore Air tank it comes with in the kit.

Fire and mode button have a nice click to them, more so with the mode button than the fire button but no complaints. The touchscreen takes a little getting use to as it is a little different than most but I found it intuitive after using it for a short time. The mode button is a really good idea, makes it easy to use and I feel the inclusion of it makes it easier to use than some of the other touchscreen mods I have. At first I did not know there was a screen protector on the screen, wasn’t until I poked the edges with some sharp tweezers that it came up. I found the touchscreen to be a little more responsive with the screen protector removed. I did have times where I had to hit the screen a few times to get a response, more so with the screen protector on. Some selections are smaller so those with big thumbs might find it aggravating but all in all it is a good touchscreen.

A good tip if you wanted to turn the screen off is to click the mode button 3 times to turn off and 3 times to turn back on. It sometimes works with 2 clicks but not always, 3 clicks works for me everytime. After taking a puff the screen stays on for 30 seconds which eats away at battery life, turning it off will save you some vape time.

Being 25.5mm wide means 25.5mm tanks will fit just right, here is the Ehpro Billow X which is 25.5mm at the base.

24mm tanks look good of course like the Geekvape Loop RDA but there is a very small gap.

No battery strap but installing and removing the battery was never a real problem since there is space near the bottom to grab on to.

Aside from the gap with some tanks and the battery door being loose which I remedied with a little electrical tape this is a solid little mod. I was going to take it apart but the screws at the bottom were not accessible without a long nose torx screwdriver which I do not have. I am not crazy about the 510 due to the gap it can leave but it would not wiggle on me when I yanked on it.

Power Performance

Not much to complain about, it is capped at 80 watts which is lower than other single 21700 mods but is conservatively fair. It feels close to accurate, maybe a little off but without an oscilloscope I am just going off experience and comparing to a Sxmini G Class. Preheat is included but it is not a % based system so I normally avoid using those.

I do love that it starts at 1.3 watts and increases by .1 watt increments until 20 watts then increases in 1 watt increments until 80 watts. It is a pet peeve of mine when mods only go in .1 watt increments, it is a waste of time IMO above 20 watts.

TC Performance

Joyetech doesn’t have a great rep when it comes to TC and the Espion Solo is no exception. I could get decent TC results at times but consistency is the problem. Sometimes I thought I had it going well but eventually it would change requiring further tweaking. Other times, like right now while writing this review it will drop me out of TC and into power mode at 20 watts. This was with a tank I had been using all day with a fresh build and the ohms locked. First 4 tanks no problem, 5th tank and now it doesn’t want to stay in TC mode. Even when it worked it could vary from time to time, great TC is about consistency and there it fails.

TC also would vary depending on builds, it was usually always at least 10 to 20f hot but with some builds it was as much as 40f hot. That is actually something I can deal with, too hot just lower the temp. Dropping out of TC is beyond annoying though, just use this mod in power mode, skip TC.

Battery Life

With the included Avatar Controls 21700 I must say battery life was pretty impressive. I measured 4186 mah with my Hohmtech Hohmbase charger. Mooch has rated the battery at 3900 mah and 20amp which is still pretty impressive.

I was able to get 222 puffs at 65 watts using a 0.17 ohm build before the battery needed charging. That is actually pretty good for me as I take about 4 second draws. This is definitely a mod I have no problems taking with me on the road due to the size and battery life. It also includes 2 amp charging with passthrough which is great for a mod on the go.

ProCore Air

I am sitting here thinking…hmmmm, what am I going to say about this tank. There is nothing wrong with it, works fine and is Smok Baby Beast coil compatible. Comes with extra o’rings and what nots as well as a spare glass and (2) 810 TFV style drip tips, not friction fit 810 compatible. The first drip tip is my favorite shown above and the other is below.

Comes with 2 coils, both the same ProCA 0.40 ohm coil which performed well, gave good flavor and had good life. The coils in my sample are marked 40 to 80 watts but I just noticed on there site they changed that to 55 to 65 watts. Good move on there part but even 65 watts can be a little too high, I liked it best at the lower 50 to 55 tops.

It is not a bad tank, I didn’t mind using it but it never struck me as a great tank. I have at least 3 other tanks that use baby beast compatible coils I would rather use instead. The ProCore Air just didn’t wow me in any way, both in performance and looks.


  • Nice looking mod
  • Good power mode performance
  • Good flavor and coil life
  • Responsive buttons and touchscreen
  • Intuitive menu
  • Great battery life with included 21700
  • 18650 adapter included
  • 2 amp passthrough charging


  • 510 is a bit raised so a lot of tanks will have a slight gap underneath
  • My sample had play in the battery door
  • TC is inconsistent, just use this in power mode
  • Screen remains on for 30 seconds with no option to change but it can be turned off
  • ProCor Air is good but not great

Final thoughts

The Espion Solo is a mod that reminds me of the eVic VTC Mini with better battery life, touchscreen and nicer looks. I liked the VTC mini in power mode and gave out 2 of them to friends to help them quit smoking. I would have no problem recommending the Espion Solo to anyone looking for a compact mod for power only use. TC users need not apply as it lacks consistency to warrant a recommendation. Maybe Arctic Fox will issue a firmware update in the future, that should be a definite improvement but if your serious about TC there are much better options. I will keep it as a mod to take if I need something small to fit in my pocket. Battery life is what makes it convenient for me and no problems using as a power only mod.

The ProCore Air…ehhh, if you get it in the kit and it only costs $10 more than just the Espion Solo by itself then it is a serviceable tank. Anymore than that then just buy the Espion Solo and a different tank, there are better options out there.

I am seeing prices for the Espion Solo starting at about $47 in the low range without a battery, you can track prices here:
I would have a hard time recommending it at that price, if it included a 21700 then that would be fair. It is a good mod for the medium wattage vaper though and if it fits you then I am sure you would be happy with it.

Thanks to Joyetech for supplying the Espion Solo with ProCore Air tank for review. You can find more info here:

Check out how this stacks up to other tasty gear and meet the Steampugs team of reviewers. Your bound to have a good time and read up on some great products, not so great ones too


Well done @mjag :+1:. Nice kit for on the go. I have one on its way to me so it’s nice to know what to expect. Thank you Sir :beers:


Thank you Eddie!

Let me know how you like it :+1:


Just as good over here! Great as always.


Thanks again man…oops, I mean Ogre :grin:


I couldn’t agree more!

Joyetech, it’s well past time to retire this antiquated chipset and release products with consistently performing TC!
It’s 2018, and you’ve milked this one for all it’s worth.

Great review bud!


Thank you bud!

You make a great point, time for Joyetech to get with the times and design a new chip that gives consistent TC performance. There big enough that they could hire someone knowledgeable in TC or just contract Evolv or Yihi for a chip, sure it raises the prices some but that would bring them into another level.


Precisely my thoughts.

Well, they don’t even have to go “that extreme”.
Smoant seems to have gotten it figured out, and they’re staying in the sub-$60 price point! :wink:

Smoant are proving it can be done, and reasonably so (though the longevity remains to be proven, and the warranty doesn’t compare). And if the price and warranty are the same (with Joyetech and the rest), there’s really no reason IMO to consider the others (in the same class).

At this point, the main reason to pay the difference for a DNA is the fact that it’s been shown to be a “lifetime” warranty, and can be serviced in the USA. Though that same aspect may be a negative for those who live abroad, considering shipping expense. Which should put the Smoant Cylon right back in the lead…


Let’s not give them any ideas, would hate for Joyetech to buy Smoant…lol. You won’t get any complaints from me about the Cylon, love that mod and Smoant has proven to put out some really good value priced mods.


I appreciate yet ANOTHER honest review @mjag , the good, the bad, and the in the middle. Means a lot to the readers.


Thank you Dman, really appreciate it!


Great review and happy you covered all the bases. I was really thinking of getting this one as from an aesthetic POV, it fits my style nicely. Sadly, the subpar TC performance and the touch screen function is a deal breaker. Too bad, I was hoping for better results. Thanks for the review!


Thank you LM!

The touchscreen really isn’t that bad, I don’t mind using it. The TC can be serviceable but on my sample unit it would be inconsistent. That is why I recommend it as a power mod, in that regard it works fine.


Welp, my big fat sausage fingers would make this a con :rofl: Sometimes girth is a curse.

Great review brother!


Thanks brother!

Yep, this time girth has done us both wrong :rofl:


I do not know if Arctic Fox will support this new Touch Screen model, but I use their firmware on my eVic and iStick, and when their internal PID controller is set ‘on’ it works better (much better !) than any other TC out there. It just blows the doors off my DNA mods, whose TC is vastly over rated anyway. DISCLAIMER: in my humble opinion. YMMV



Arctic fox is good stuff, I made mention of it in my review and usually do when it comes to joyetech/wismec/eleaf mods. I am hoping they come out with support for the original Espion, Tessera and the Solo, I will install it asap.

Out of the box a lot of DNA mods are not great unless they had someone good make a custom theme and profiles. They can be great though, just takes some work if not setup properly at the factory.

1 Like

Looks like a fine kit, thanks for reviewing it :smile:
I like my wifes :slight_smile:


Thank you my Alien friend. Not crazy about the probes but your all right…lol