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Joyetech Espion Kit Review

Updated on: 2019-03-28

First Impression Out Of The Box

When it comes to the Espion kit by Joyetech, we have some of their typical packaging here. Open the box and in a foam insert, you will find the mod sitting on top. Pull out the foam insert and underneath all of the paperwork, there will be a separate white Joyetech box with a spare coil as well as a spare parts bag. Next to that white box, there is a nicely sized USB cable.

I have to admit that when I first saw this mod, I thought that it had an extremely generic look to it. I noticed that Joyetech was marketing it as a businessman sort of mod. Once I looked at it in that context, I can understand where they were going with that type of marketing. It does look like something that a guy in a suit would carry. I should know, for 25 years, I was one of those guys in a suit. It’s a good looking mod and it has a very subtle, understated, no nonsense look to it. Let’s load this thing up with some batteries, put some juice in the tank, and see how it actually performs.

What’s In The Box

  • 1 x Espion Box Mod
  • 1 x ProCore X Atomizer – 2ml
  • 1 x ProC1 0.4ohm DL Head
  • 1 x ProC1-S 0.25ohm MTL Head
  • 1 x Extended Vent Pipe
  • 1 x Spare Glass Tube (4.5ml)
  • 1 x QC USB Cable
  • 1 x Spare Parts

Joyetech Espion Kit box

From Top To Bottom

The Mod:

The Espion is square in shape with rounded corners. It has a centered 510 that is spring loaded and gold plated. There is no real top plate to the 510 but it does have a bit of a recession going around the 510 itself. There are also four cutouts along the raised portion of the recession that provide some air flow to the bottom of your atomizer. The 510 has a really springy, long throw to it. The Espion mod will hold a 25mm atomizer with no overhang. You can also run a 28 mm atomizer on it but there will be some very slight overhang on the front and the back of the mod. It doesn’t look bad with 28’s but it definitely looks better with 25’s.

Joyetech Espion Kit pin

With the mod facing you, on the left side of the mod is where the fire button is located. The fire button has some Joyetech branding on it and it is rectangular in shape. The edges of it kind of wrap around the corners of the mod and the corners of the fire button are rounded off. The button is stainless steel and it does look good against a black mod. It is a clicky and tactile fire button with a really fast response time. Overall, it’s a very comfortable fire button that is easy to find and use. It is very comfortable firing this button with your thumb or finger.

Joyetech Espion Kit side

The whole mod is made out of metal and it has some sort of straight grooves that go around the whole surface of the mod. The grooves definitely give it a nice texture and a sleek look. There is really no other branding on the mod except for the fire button and the backplate, where there is some Espion branding but it is done in black lettering on a black mod, so it is very subtle. I thought the name of the kit was a little weird, so I did Google it. I found out that the word Espion is actually French for spy.

Joyetech Espion Kit board

The battery door is located on the bottom of the mod and it is the push-down, push-out sort of door. There is some texture on the back of the battery door that allows you to get a grip when you are opening it. The door is attached with a hinge system and it is very solid. When you close it, it does give you a satisfying click to let you know that it is shut. On the inside of the battery door, there are positive and negative battery indicator markings as well as A and B markings. On the inside of the battery door, there are two button style, gold-plated, battery contacts. The battery tubes are made out of plastic and on the interior, you will see a plus and minus button done in red and blue. The contacts on the bottom of the tube are spring loaded and gold plated. So far, every battery that I have put into this mod has fit in there nice and snug with no movement at all. There’s also no battery or door rattle.

Joyetech Espion Kit screen

Front and center on the Joyetech Espion, we have a 1.45-inch TFT color display with the screen lay out in a vertical arrangement. The Espion screen is very bright and you will be able to view it in all lighting conditions, including direct sunlight. On the screen, you will be able to see the time of day, a dual-battery meter, mode, wattage, temperature, volts, resistance, and a puff counter. The background of the screen has the ability to change color. There are four background color choices that include black, gray, green, blue, and brown. I love the fact that you can see the time on the main screen. Every mod should have this feature.

Joyetech Espion Kit usb

Located below the screen is the select button and the up & down buttons. The select button is square in shape and it is kind of small for a mod of this size. The select button enables you to select menu choices but on the main screen, it doubles as a stealth button. On the main screen, all you do is hit the select button to shut the screen off, and then you hit the select button to turn the screen on again, if you wish. The up and down button is one solid button with each side being very responsive. The button is rectangular in shape and the same width as the select button. The mod does scroll in .1 ohm increments but once it gets going, it does scroll rather fast. All the interface buttons are very tactile with a nice click to them. Below the buttons, there is a USB charge update port. This mod is firmware upgradeable and it does charge at 2 amps.

Joyetech Espion Kit bottom

The Tank

The Espion comes with a Pro Core X tank and two coils. The X tank is a Pro Core tank and I have used a lot of Pro Core tanks in the past. The top fill actually reminds me a lot of the sense Blazer top cap. It has what I call a toilet seat type of top cap, because when you flip it open, it looks like an open toilet seat. The X has two juice fill ports on either side and a gasket around them. The juice fill ports look like two little curved slots and they will accommodate most juice bottles on the market today.

Joyetech Espion Kit parts

The drip tip on the Pro Core X has a metal interior but the exterior is made of Delrin. Unfortunately, as with most Pro Core tanks, you cannot use your own drip tip on this tank. I would really like to see Joyetech correct that and find a way to make a Pro Core tank with a removable drip tip. In order to open the tank, you have to locate the drop symbol and push forward. Once you push forward, the top cap will flip open and reveal the juice fill ports.

Joyetech Espion Kit tank

The Pro Core tank does use Pyrex glass and it has a 4.5 ml capacity. It has a conically designed chimney that screws right into the top of your coil. The bottom of your coil screws into the base and all of this holds the glass in place via the tension created when screwing both ends of the coil into the tank. There is a thick o’ring at the base that will definitely guard against leaks. I have vaped this tank a lot and it does not leak. On the base, we have dual adjustable airflow so whatever you adjust on one side will happen on the other side as well. The action on the AFC is smooth but there are no click positions on it. It does have stoppers on both ends. Threading on the 510 pin is smooth and the 510 pin itself looks to be made out of stainless steel. Overall, it’s a decently machined tank that vapes pretty well.

Joyetech Espion Kit component

The kit also comes with a 2 ml glass to make it TPD compliant. I have to be totally honest, I have never used that glass and I really have no need to use it in the future. Whenever I get a kit like this, I automatically install the chimney extension and put the larger glass on. I know that companies have to make things that are TPD compliant for our European brethren but I wish they wouldn’t include us when they make up these kits. I would love to see them make a kit for the Europeans and then one for the rest of the world.

The Coils

Joyetech Espion Kit coilfam

Included in your Espion kit from Joyetech, you will get two coils. One is the Pro C1 .4 ohm atomizer head and the other is the Pro C1S .25 ohm atomizer head. One is for direct lung vaping and the other is for MTL vaping. I really would not call the C1S coil a true MTL coil, it is more of a lower wattage flavor coil. I will go over both of them in detail now.

Joyetech Espion Kit coil

The first coil I used was the .4 ohm coil. It has a rating of 40 to 80 watts and a best recommended wattage of 55 to 65 watts. That best rating is actually pretty accurate because I really do enjoy running this coil right in the middle at around 60 watts. I get very good flavor from the coil and the cloud production is excellent as well. I normally like to vape right around 80 watts, so this is just a little bit below what I usually enjoy. It is actually a very good coil and you do get excellent flavor and very good cloud production. It will keep up at 80 watts and still maintain good flavor. It’s just a little bit more flavorful at around 60 watts as opposed to 80 watts.

Joyetech Espion Kit proc1

The second coil I tried was the .25 ohm coil. Joyetech has it rated from 25 to 55 watts with a best range of 30 to 40 watts. I did enjoy running this coil on the lower end of the spectrum. I did find that when I pushed this coil past 40 watts, it had a hard time keeping up. The juice would taste slightly burnt above 40 watts and it just was not pleasant in that range. For me, 30 watts is the sweet spot where I did get a very nice, flavorful yet cool vape. Really, not my type of vape but I know there are people out there that enjoy vaping like this. For those that like to be under the 40 watt range, this is a pretty good coil but I would not recommend pushing it past 30 watts.

The Look, Feel, And General Aesthetics Of The Mod

Joyetech Espion Kit feel

I have to admit, for a 2 battery mod, the Espion has a pretty small form factor, even by today’s standards. When I first received this mod, the look of it was very bland to me but I have to be totally honest and admit that the look of it has really grown on me. For some reason, the more I look at this mod, the more I like the aesthetics of it. The Espion has a comfortable form factor to it and it does feel really good in the hand. It is also very pocketable, especially for a dual 18650 mod. I do like the no-nonsense look of it and it does have a business-like appeal, as far as the looks go. Joyetech has been kind of absent from the dual 18650 market and this is a good looking mod that they have put forth, to compete in a very competitive sub category. If you like that very understated type of look, then you are definitely going to love the Espion.

Joyetech Espion Kit look

The Board

This is a new proprietary board for Joyetech. I review most of their products and I have never seen this one before. It has a different menu system and a totally different screen to it than anything that I reviewed in the past. The Espion actually has a 4-button interface, which is definitely new for Joyetech. While it is nice to see a fourth button on this mod, I do think the Joyetech could have done a better job of making more use of it. All they really did was add a select button. You still have to click the fire button 3 times in order to get into the main menu. I would have rather have seen them use this as a menu button as opposed to a select button that they decided to go with.

Joyetech Espion Kit board

The Espion does have a full temperature control suite that has the ability to TC and Ni, Ti, and SS. It also has a TCR function with three memory slots for your custom wires as well as a preheat function. In TC mode, the mod is capable of firing as low as .05 ohms and in power mode, it will fire as low as .1 ohm. It has a temperature range of 200 to 600 degrees Fahrenheit.

The Menu System

This is a brand new menu system for Joyetech but it is definitely easy to learn.

  • Click the fire button 5 times to turn the mod on and off.
  • With the screen on, click the fire button 3 times to enter the main menu screen.
  • Once in the main menu screen, use the up and down button to scroll through your choices and use the select button to select your choices.
  • To change your wattage in TC mode, you have to go into the set sub menu and change your wattage there.

Joyetech Espion Kit menu

My only real complaint about the menu system is that you kind of have to jump through hoops in order to change your wattage in TC mode. I’m sure that can easily be fixed with a firmware update. There should be some sort of shortcut when you are in TC mode that enables you to change your wattage in a much easier manner.

How Does It Vape

I have enjoyed my time with the Espion kit. The one thing you notice right away, when you start using this mod, is that it fires right away. There is virtually no lag time from when you hit the button and the vapor starts coming out of your atomizer. This thing fires really quick. As far as the accuracy goes, I doubt it does the full 200 watts. I’m sure it’s coming close enough at around 175 or 180 watts but it’s definitely not doing the full 200 watts. I did vape it next to my 3 battery DNA and that’s exactly what it felt like, around 175 watts.

As far as the TC goes, Joyetech just continues to frustrate me with their janky TC. The thing that’s so frustrating about it is that sometimes the TC works and sometimes, it doesn’t. This has been an issue with more than one Joyetech mod. This mod seems to do better with a single coil in TC mode. When it works in that mode, with a single coil, the TC is actually really good. For some reason unbeknownst to me, I run into trouble when I run a dual coil tank on this mod in TC mode. No matter what tank I put on, if it has dual coils in it, I am constantly getting kicked out of TC. I just don’t understand that and I don’t know why Joyetech can’t make it a priority to nail down their TC. The shame of it is, when it does work, the TC is actually really good.

What Would Make It Better

  • Enough Already! Fix The TC!
  • Replaceable DT

I don’t know any other way to explain this. It’s getting to the point of ridiculousness already. I can’t understand why Joyetech does not make a concerted effort to fix their TC. People want TC, people like TC, if you are not going to do it properly, then why even offer it on your mods. Just make it a power mode only mod and let’s just stop this ridiculous dance already.

When you think about it, it’s really kind of ridiculous that this tank does not have a replaceable drip tip. Nobody wants a drip tip that they can’t replace. What if it’s just not comfortable to me? What am I supposed to do? Just live with it? Even though it is a comfortable drip tip, I want the ability to be able to replace it.


This is a very generic, no-nonsense looking kit. I could actually see how it would appeal to a business person and why Joyetech is marketing it that way. It’s a good looking, business-like mod with clean lines and a good performing tank. I like the screen, I like the fire button, and I like the way it vapes in power mode. The TC unfortunately is a total fail. Joyetech really has to get their act together and start nailing their TC down. If you guys are reading this, please take these comments to heart and do something about the TC because it’s been an ongoing problem for a long time now. Other than that, if you’re not a TC vaper, then you’ll probably enjoy this kit a lot. It has a great form factor and it is definitely on the small side as far as dual 18650 mods go.



  • Dimensions: 3-1/4″ x 1-3/4″ x 1″
  • Utilizes (2) High Amp 18650 Batteries – Sold Separately
  • Output wattage: 1 – 200W
  • Mode: Power/TC(Ni, Ti, SS)/TCR (M1, M2, M3)/RTC
  • Display: 1.45-inch TFT color screen
  • Resistance range: 0.05 – 1.5 ohm (TC/TCR mode)/ 0.1 – 3.5ohm (Power/Bypass mode)
  • Temperature Control Range: 100℃-315℃/200F-600F
  • Max charging current: 2A
  • Max output current: 40 amps
  • Max output voltage: 9V
  • Thread: 510 thread


  • Dimensions: 1-3/4″ x 1″ (Including Threads)
  • Capacity: 2ml ( can be extended to 4.5ml)
  • Coil: ProC1 0.4ohm DL Head (40 – 80W)/ ProC1-S 0.25ohm MTL Head (25 – 55W)
  • Thread: 510 thread
  • Top Filled
  • Adjustable Airflow

  • Form Factor
  • Size
  • Pocketability
  • Nice Big Colorful Screen
  • Great Fire Button
  • Fires Fast
  • Easy Menu System
  • 4 Button Interface
  • Clean Look
  • Nice Texture
  • Battery Door Is Well Done
  • Clock On The Main Screen
  • Centered 510
  • 25 mm Tanks Fit With No Overhang
  • 2 Amp Charging
  • Pros for the Tank:
  • Good Flavor
  • Decent Coil Selection
  • Good Clouds
  • Bottom Airflow
  • Top Fill
  • Good Capacity
  • Smooth Airflow
  • Bad TC
  • Changing The Wattage In TC Is A Pain
  • Cons for the Tank:
  • Proprietary DT
  • DT Is Not Removable


Joyetech Espion Kit
$33.00 $49.50

DeucesJack is head of reviews at Vaping Insider and has become known as one of the best reviewers in the industry. He pulls no punches and always gives an honest and unbiased opinion on the products he reviews. Since the launch of our youtube channel in 2018 he has put out a review video every single day.