Eleaf iStick 100W TC Review

We review the new dual 18650 Eleaf iStick 100W box mod with temperature control.

Eleaf iStick 100W TC
Eleaf iStick 100W TC

Eleaf iStick 100W TC Intro

Today we’re taking a quick look at the Eleaf iStick 100W TC, which is a dual 18650, 120 watt (more on that later), temperature control mod. The iStick 100W TC is a reasonably priced, TC capable mod with plenty of power. Eleaf is known for their bargain-priced mods, and, sometimes, Eleaf products can be hit or miss with regard to durability and longevity. This mod isn’t old enough to speak to those aspects, but it does feel like a more quality device than the previous iStick 100W.


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Eleaf iStick TC100W Specs and Features

  • Gift Box
  • iStick TC100W mod
  • USB charging and software update cable
  • User manual
  • Size: 52mm*23mm*94mm
  • Thread type: 510 thread
  • Cell type: high-rate 18650 cells
  • (Discharge current should be above 25A, for example, Sony VTC4)
  • Output mode: VW/Bypass/TC(Ni/Ti/SS/TCR-M1,M2,M3) mode
  • Output wattage: 1-100W
  • Resistance range: 0.05-1.5ohm (TC modes)
  • 0.1-3.5ohm (VW/Bypass mode)
  • Temperature range: 100-315C/200-600F(TC modes)
  • Color: grey, black, white

Notable Remarks

Fit and Finish of the iStick 100W/TC

Eleaf iStick 100W TC Black & White
Eleaf iStick 100W TC Black & White

Fit and finish are “ok.” The magnetic battery doors on the iStick100W/TC are held tight, but there are small gaps at top and bottom of the doors (not unsightly, but worth noting). The screen is on the dim side due to the smoked plastic cover plate. The buttons are plastic and rattle slightly (but nowhere near how much button rattle was on the iStick 100W). The exterior paint (I have the black one) is nicely done and seems durable.

Ease of Use

Using the mod is stone simple. The Eleaf iStick TC100W doesn’t have a lot of configuration features, so setting it up to use is as easy as turn it on, select wire type, set desired wattage limit, set desired temperature and vape. In TC mode, the mod supports Ni200, TiG1, SS316, and manual TCR entry which allows the use of any wire type.

Unique feature on the iStick 100W/TC

Eleaf iStick 100W TC Modular
Eleaf iStick 100W TC Modular

One interesting feature is the fire bar. Rather than a fire button, the Eleaf iStck TC100W uses one of the battery doors as a fire bar, similar to the Smok Xcube II fire bar. There is no fumbling for a fire button with this mod. Instead of squeezing a finger to fire, you just grip the mod.

Form Factor

iStick 100W TC

I’d say one of the best aspects of this mod is the form factor. The Eleaf iStick TC100W is very compact for a dual 18650 TC mod and features rounded sides. This mod feels great in the hand and is small enough to slip into most pockets, unless you wear skinny jeans!


The firmware is user upgradable. Eleaf has already come out with an upgrade which will allow the mod to supply up to 120 watts. Upgrades are available on the Eleaf website.

Performance of the Eleaf iStick 100W/TC

The performance is “ok.” There is a noticeable lag between pressing the fire bar and the mod actually firing. I also found the TC to run on the cool side when using titanium grade 1 wire (no big deal, just increase the temp setting, but I need to mention it). It does provide plenty of power and it does regulate temperature very smoothly.


  • Reasonable price
  • Compact form factor and comfortable feel
  • Built in support for several common wire types along with manual TCR entry capability
  • Smooth TC vape with plenty of power
  • Easy to set up and use, plus firmware is upgradable (upgrade to 120W already available)


  • Firing time lag is annoying
  • Gaps at ends of battery doors and has some button rattle
  • Slightly wider than 22mm so 22mm attys “underhang” the top of the mod
  • Dim screen


The Eleaf iStick TC100W is a nice little dual 18650 mod that does temp control. While I found the TC accuracy to be a little off, the stability was perfect, providing a smooth TC vape with no issues there. The price is reasonable for what you get and I plan to carry this mod with me often.


Check out this product via the button below

Get free shipping on the link below!

*Some discounts are dependent on your geographical location.

Keith, a.k.a, Old Mad Scientist: I have been working in the electronic and computer engineering fields since the “dark ages” (starting in the mid 1970’s) and have been an avid ecig user and tinkerer since 2013. I’ve been testing vape equipment with an engineering “bent,” and enjoy testing and evaluating new vape equipment and new build techniques.

  • Steven Marto

    I have the istick 30watt. I recently bought the TFV4 tank. I was wondering if the tank is compatible with the 30watt istick?

    • Old Mad Scientist

      Hi Steve,

      Thanks for the question. I don’t have an iStick 30W handy to try, but we have some info that there might be an issue with the TFV4 tank and some eleaf 510s. See this article:

      My advice is if you want to use that tank on your eleaf (or any mod really) be careful not to over tighten it if it doesn’t want to screw all the way down to sit flush. I think any mod manufacturer “should” be providing a 510 that can handle attys with a longer reach, but there doesn’t seem to be any true engineering standard for the 510 connector length (at least not yet) so issues are bound to crop up.

      Hope that helps,


      • william sims

        Any GOOD manufacturer isn’t the ELEAF line, throw the GD thing in the garbage buy an sx mini or sx Q this month and you will have something you can count on for as long as you want. You get what you pay for, and know that a 29.00 100 watt mod is a DISPOSABLE mod, because you only paid less than a pack of tfv4 coils for your mod. Kill the Eleaf and move on to almost anything else and you will have something.

        • Old Mad Scientist

          True, the SX Mini M-Class, ML-Class and the new Q are in a higher league, with prices commensurate. You do get what you pay for and you are exactly right about that.

          I have to admit though that I was pleasantly surprised by the iStick 100W TC. It has been holding up with no issues so far. If you already have some higher end mods, the iStick can make a good backup mod at its price point. I’m taking the iStick to the beach this summer. I won’t intentionally dunk it in the surf or sand but if accidents happen, no great loss.

    • Jeremy

      Compatible in the sense that it will screw on, yes, but not compatible in the sense that the mod will be able to power the tank really well. That tank will require at least 2x as much power all the way up to and past 3x as much power.

  • armckee3664

    I keep setting the temp on my istick tc 100 and when I vape it kicks me back to wattage at 20 watts.. ..?? Any reason why this is happning?

    • Fred

      I have the same problem !!

  • A D

    No lag I noticed and with new firmware you can preheat unit with a wattage for a period of time going back to set wattage. This gives coil a burst to get going then can back down. All the settings you would want. Great unit for price $30-40!