[Review] Average Vaper Review – Eleaf iStick Pico 21700 Kit!

Good Afternoon ECR and Happy Friday! Today I am reviewing for you the Eleaf iStick Pico 21700. The kit includes the iStick Pico 21700 and the 25mm Ello subohm tank. If you're at all familiar with most any of the other renditions of the Pico, then you pretty much already know what this is about. However, you'll be sure to get more vape life out of this variation courtesy of a 21700 battery.

This product was sent to me directly from Eleaf for the purpose of a review.

I have had the Eleaf iStick Pico 21700 for over 3 weeks now and feel I can give a fair assessment of its quality.

I say this is an Average Vaper Review because I am coming at this from the perspective of someone who has been vaping for a while, but doesn't get too in-depth with the products. I'm evaluating these products as to how well they work out the box, their ease of use, and whether or not they hold up over the course of use. I don't have the skill set to produce thorough testings of the electronics and I defer that to those better suited. This review is purely my experience using the items I was sent.

On to the review.


Pico 21700

  • Dimensions: 51mm x 26mm x 77mm
  • Weight: 96.6g (without battery)
  • battery Type: 21700/18650 (21700 may be included, depending on the kit you get)
  • Max Output: 100w
  • Output Voltage: .5-9V
  • modes: VW / Bypass / TC(Ni/Ti/SS/TCR)
  • Resistance Range: .1-3.5ohm(VW/Bypass) / .05-1.5ohm(TC)
  • Maximum battery Charging Current: 2A
  • Firmware Upgradeable

Ello Tank

  • Height: 46mm
  • Diameter: 25mm
  • Weight: 45.6g
  • Capacity 2/4mL

Current color options include Greenery, Brushed Silver, Black, Silver, Grey, and Hot Pink.


  • iStick Pico 21700
  • Ello Subohm Tank
  • AVB 21700 battery (optional)
  • HW2 Dual-Cylinder .3ohm Coil
  • HW1-C Single-Cylinder .25ohm Coil
  • Spare Parts:o-rings, extra drip-tip, 2mL-to-4mL chimney conversion, 4mL glass, 18650-to-21700 conversion cap.
  • Quick Charge USB Cable
  • 2 x User Manual


Some pics will also be posted individually in the review


  • 5 clicks on. 5 clicks off.
  • Hold + and – when off for Screen Flip.
  • Hold + and – when on for Key Lock
  • 10 click on for Board Temp.
  • 3 clicks when on to select Vaping mode.
  • 4 clicks in TC mode to Adjust Wattage.
  • Hold fire button and + to enter Set Menu. From here you can lock/unlock resistance when in TC, turn on/off stealth mode, change the Subparameter that displays, turn on/off logo, view battery voltage, view version, manage Preheat, and manage TCR.

Eleaf iStick Pico 21700


The iStick Pico 21700 is Eleaf's latest entry into the Pico line of products. This is a line that includes numerous devices and is pretty well-known throughout the vaping industry. I guess if it ain't broke, don't fix it is Eleaf's motto for this line. While it has seen a few variations throughout the years, the main look, feel, and function has remained the same, and this new iteration is no different.

The Pico 21700 maintains the basic shape, layout, and functionality of the original Pico. Of course, it has a bit of added size and heft to it to accomodate 21700s, yet it's not much to notice. This rendition is still able to maintain its pocket-frienliness and is a very comfortable mod.

Let's start at the top.

The device has a spring-loaded 510 and buttery smooth threading. The mod can accomodate up to 25mm attys. Anything over 25mm will not fit due to the battery cap getting in the way. I put the Wismec Gnome EVO on it because it is technically a 25mm atty, yet its airflow control ring comes out just a bit more than 25mm. HERE you can see there is about 1mm of clearance between the atty and battery cap and it was quite a pain to screw it on. So just know, 25mm is your limit here.

Speaking of the battery cap: while the threading seemed fairly smooth, you have to give it a bit of pressure to get it catch. This is with the supplied AVB battery. I don't have any other 21700s to test, but I remember seeing a DJLsb video where the AVB batteries measure more than 70mm tall (70.8 I believe). I think this might be what is causing this small issue, but can't independently confirm that.

The body of the mod is really smooth and hand friendly. It's quite a comfortable mod to hold and isn't too heavy, even with the battery in it. The paint on the one I received (Greenery) has a media-blasted texture to it. I'm fairly partial to this look as smudges tend to be a non-issue and I just think it looks nice. Some of the other color version have more of a smooth texture, if that's your thing.

The fire button on the mod is quite clicky, yet it's fairly mushy. It doesn't rattle, it just has a bit of a soft throw to it before it actuates. It never became an issue, but thought it was worth mentioning.

Travelling down we have a nice, vivid screen that has all your information on it. It's kind of an outdated and simplistic screen, but it's in line with the rest of the Pico line. I really wish there was a battery percentage indicator on it. It's not really necessary, but it's something that I like to see on my mods. There are plenty of menus to be found and adjustments that can be made.

(Rant incoming. Sorry) And speaking of menus, I've noticed a trend with a few mods lately: menus and functions are all over the place. Hold this and this. Triple-click this. Quadruple-click this. We are all pretty familiar with the various shortcuts that are available on mods to access menus and quick adjustments. I just feel like it's time to get more organized. This is nothing against this mod in particular, it's just something I've noticed. I really like the use of a Function or Menu button to bring everything together. Maybe have a few shortcuts to make adjustments on-the-fly, but that's it. Menus and submenus work well. I don't need to have a different way to enter a particular menu that could have easily been a submenu within the main. (sorry for that rant).

On the Bottom of the device is your battery venting and +/- buttons. The buttons are very clicky and responsive and don't produce any rattle. However, I'm just not a fan of the buttons on the bottom. I know this is the way these devices have been designed in the past, and it works for them, just me personally I like them to be on the side/front of the mod so I don't have to awkwardly grip the mod if I need to function press certain buttons.


I used this device in Power mode and SS Temp Control mode and it performed well in each mode. Outside of the Ello Tank, I used single coil attys, particularly the Pulse 22 and Zeus, around 50-60 watts, and really like how it performs. There is a slight bit of rampup time, but it's really not bad and power output seems to be on par with other devices I use. I never had a misstep while using this device, and it always performed as I expected it.

TC was tested with a single coil AVS SS316L 26/30, 6 wrap, 2.5 ID, around .4ohms between 420-450°F around 50-55 watts. The slight ramp-up delay persists in TC mode, but as I state before, it's not too noticeable. TC worked well for me and the device managed to not burn my cotton.

As far as performance goes, I have to say I really like how this little device works. I kept my power usage at and below 60 watts as I feel like this is going to be the best spot for this device. You have to keep in mind, it's still a single battery mod, and while it accomodates 21700 batteries, using it at high wattages is going to drain it that much more quickly. For a device like this, I'm more inclined to do higher ohm builds with lower watts and I'll take that much more battery life because of it.

One more thing to note about device performance. I do not have a charger that is able to accomodate the AVB 21700 batteries and so I used the mod to internally charge my battery. I feel like the device charged the battery pretty well and didn't get too hot in the process. I charged my battery multiple times within the device and have not had any issues with it.

Ello Subohm Tank

The Ello tank is a decent little top-fill subohm atty. The adjustment ring moves pretty smoothly and there are quite large slits for the airflow. This should help accomodate those that like ample amounts of airflow. The styling of the tank is pretty minimal and looks nice on the device. The Eleaf name is engraved on the side of the tank as well as the word Open. If you haven't guessed, Open is where you push to slide the top open and fill your tank. The sliding system moves easily enough when pushing on it and has a satisfying click open and close. The fill port is adequate for whatever type of bottle you have.

The HW2 coil ohmed in around .3-.34 and the HW1-C was .25-.27. The HW2 coil is NiCr and the HW1-C is Kanthal with ceramic around the outside of the cotton (to retain heat I assume). I personally liked the HW2 coil better. It had better flavor, but didn't quite last as long. Whereas the HW1-C lasted longer with less flavor. There are also Three Other Options for Coils:HW1-.2ohm SS316L; HW3-.2ohm NiCr; HW4-.3ohm NiCr.

As far as performance goes, this tank is okay. I'm not really a subohm tank kind of guy, so I'm not the best at evaluating subohm tanks. I can compare it to an RDA, but that's not really going to be a fair comparrison. I think it's decent for what it is. Am I going to run out and go buy it?…nope. Would someone else get enjoyment out of it?…yep.

Final Thoughts

At the end of the day, the Pico 21700 is a well performing device with a great feel and form factor and perfect for on-the-go vaping. It's size lends itself nicely to your hand and pocket, and the ability to use 21700 batteries means you'll have that much more battery life. Keep in mind, I believe running this device around 60 watts is going to be your best bet for battery life with this one, but that should come as a no brainer.

The battery cap can be a little finnicky with the included battery, the screen can use an update as well as the menu system, and I don't personally care for the +/- buttons on the bottom of the device. These are very minor annoyance I've had with this device, and most of them are really just personal preference. I will definitely keep this baby in my rotation for a quick out-and-about vape.


None of the links are affiliate links. They just tend to be where I purchase most of my gear from and the ones I know and trust.

Thank you for your attention ECR. I hope you all have a great weekend!

I want to give another shoutout to Eleaf for giving me the opportunity to provide this community with this review. If you want to check them out, you can follow them on their Facebook or Instagram pages.


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