Finding a mod that fits your style can be a pain. With so many styles and options, it’s easy to get analysis paralysis. Well, VaporFi has your back with the Vex 75 TC! This versatile mod is feature rich and easy to use. Perfect for casual e-cig users and veteran vapers alike.

What’s in the Box?

  • Vaporfi Vex 75 TC Mod (Battery not included)
  • USB Charger
  • User Guide

Who is it for?

the vex 75 is a great mod for just about any type of vaper

That’s a tough question to answer. A better question would be who isn’t it for? The preset power mode is great for new users or those who want to throw their vape on autopilot and not have to think about it. TC (Temperature Control) mode lets you customize your vaping experience without busting out any science books. TCR (Temperature Coefficient Resistance) mode is great for advanced vapers who want to fine-tune their vaping experience. Finally, the bypass mode caters to those of us who want to go back to the mech mod days and avoid those newfangled computer chips. This mod casts a wide net, yet it still manages to satisfy. Man do we love this mod’s flexibility!

VaporFi Vex 75 TC Review

I have always been a minimalist at heart so I have to tell you this mod looks and feels extremely satisfying. It is sleek, compact and offered in color options of black or stainless steel finish. The smooth design and rounded edges are comfortable to hold for hours on end without fatigue. The OLED display screen hits the size sweet-spot. It provides you all the info you need to know without any needless frills. I’m not a fan of lugging around any more heft than I have to. I have enough with my keys, wallet, and phone weighing me down. Too many mods these days are bulky and won’t fit comfortably in your pocket. They make you feel like you are dragging an anchor around. The Vex really shines here with its lightweight yet tough design. Speaking of durability, I have heard many horror stories about folks investing in expensive box mods only to break them after two weeks. All it takes is a tiny fall and it is all over for your device. This is unacceptable and Vaporfi takes its product’s durability seriously. During our testing, we certainly weren’t gentle (dropping, tossing, hitting, etc) but it took the hits like a champ and was no worse for wear.


the vox is a strong mod that can have a power kick

This is where the investment goes. How well does it perform? Let me tell you this mod packs one heck of a punch for its small size. Every time we fired it up there was a satisfying click from its power button and a quick draw of vapor. This thing can hit like a hammer when you want it to. We were pleasantly surprised by its consistent vapor production and strong flavor once we got it dialed in. Every puff was as good as the last and there wasn’t a dry hit in sight. Customizing the Vox is a breeze. You can use almost any 22mm sized atomizers as low as 0.05 ohms. The hitch here is you can only use these low ohm coils in TC mode. This allows for safe sub-ohm vaping that produce massive plumes of vape. You will make your cloud chasing friends jealous. When switching over to TCR mode you get quite a bit more freedom to change up your atomizer game. TCR mode runs flawlessly, though, it does require a higher level of understanding to operate.

Batteries and Charging

the vex uses rechargeable batteries and can be charged with a usb passthrough

There is nothing worse than killing your vape’s battery midway through the day. Nobody wants to be tethered to a power source while they wait for their battery to charge. Vaporfi has offered a solution for you. Unlike the Vox 60 and the VAIO 80, the Vex 75 has an external battery that can be swapped out when needed. The best part is you can still charge your battery via the USB passthrough option. It’s the best of both worlds! During our testing, we were able to get our batteries to last about a full day on 20 watts while puffing on it consistently. When cranked up to 65 watts the batteries still lasted a solid 7 hours of constant vaping. This is great for a single battery mod. We found ourselves swapping out our batteries instead of using the passthrough feature, though it was nice to be able to charge up in the car via USB. In the end, we never had to stop vaping due to a dead battery. This is a big plus for us.


  • 22 x 38.5 x 82 mm
  • 0.96” inch OLED screen
  • Brushed Zinc alloy body
  • uses 1 20A 18650 battery (not included)
  • wattage range 1-75 watts
  • Resistance range 0.1 – 3.5 ohms
  • Temperature resistance range 0.05 – 1.5 ohms
  • Temperature range 200
  • ºF – 600ºF / 100ºC – 315ºC

Using the Vex 75 TC

the vaporfi vex 75 has tc tcr and bypass modes

Vaporfi has focused on streamlining their products by eliminating unnecessary confusion without compromising features. There are 4 modes for you to choose from. Power mode is the default setting and by far the easiest to use. Many vapers will spend the majority of their time in this setting. Use the positive and negative buttons to adjust your watts and push the power button to fire away. It’s as simple as that! To switch modes push the power button 3 times (while on). Use the positive button to shuffle between modes and the negative button to cycle through options. Push the power button again to confirm your changes and you are ready to go!

TC Mode

TC mode is where you want to be if you are looking for customization minus the complexity. When in TC mode press the negative button to select your atomizer’s coil type and cycle through the metal options. There are 3 coil options: TI (Titanium 1), NI (Nickel 200), and SS316 (Stainless Steel 316). Once you find your coil’s metal listed, push the power button to select it. Optionally you can change the wattage here by pushing the Negative button twice when in mode selection. Once you have your coil and wattage selected, set your desired temperature with the positive and negative buttons. Now you can vape those fancy juices without worrying about burnt or dry hits.

Remember the Ohm’s

TCR mode may be a bit confusing to some. I had to brush up on my coil metals and math skills to get a full grasp of the subject. I’ll try to give you a quick summary to help you better understand what this is all about. Many vapers will know of Ohm’s law. If you don’t or need a refresher there is a great article by that will give you a crash course. They fill you in on volts, amps, watts, and ohms.

The Growing Resistance

Even if you are familiar with Ohm’s law you may not know that the resistance (ohms) of a metal actually increases as it gets hotter. The problem here is that different metals increase their resistance at a different (though consistent) rate. This is why TC mode has you select what type of metal your coil is using. The chipset knows the rate at which that particular metal’s resistance increases and adjusts the voltage accordingly. That’s fine and dandy when you are using one of the three most common coil types offered, but what if your coils are made out of say SS317? This is where TCR mode comes in. Each type of metal has a TCR number that you can manually enter in and the chip will do the rest of the heavy lifting for you.

What is TCR Mode?

The TCR function is amazing, however, there are some drawbacks you should know about. The bad news is that most atomizers don’t give you their TCR value. We personally believe that they should but that is another story altogether. The good news is finding your coil’s TCR value is very simple thanks to Steam Engine’s Wire Wizard. Here you select the metal your coil is made out of and Wire Wizard does the rest for you. This page has a lot of info that can be very useful for you vaping savants out there. Today the only thing we want to focus on is the “TCR in vaping range”. This number will fall between 1-1000 (once the equation is done) and will be the TCR value you use.

Using TCR Mode

Now that we got that out of the way, how do you enter these settings? There are 3 memory slots that you can save your coils’ TCR value in. To set these hold the Power and Positive buttons for 5 seconds while the device is off to access the memory mode. Once there, use the negative button to move through the 3 memories and push the power button to select that memory. After that push the positive and negative buttons to set your TCR value and press the power button to accept the number. The great thing about this feature is you only need to set these numbers once unless you are using more than 3 types of coil metals.

Bypass Mode

Bypass mode does just what the name entails. It bypasses the mod’s computer chip and causes the Vex to act like a mechanical mod. As a result, your mod’s power output (wattage) is now determined by the charge of your battery and the resistance of your coils. This mode is only recommended for advanced vapers with experience vaping at intense coefficients. You can easily damage your battery and burn your coils in this mode.

Additional Features

the vaporfi vex includes features like stealth mod and key lock

Stealth Mode

This isn’t so much a mode as it is a feature. Hold the power and negative buttons to activate stealth mode. Now you can fire your vape without lighting up your OLED screen. This saves battery life and is nice when you don’t want to light up a dark room every time you take a puff. The cool thing is your screen will still light up if you need to change any of your settings. Bright when you need it, dark when you don’t.

Key Lock

Hold the positive and negative buttons for 3 seconds to activate/deactivate key lock mode. This allows you to vape unhindered but stops your settings from being changed by accidental key presses. This is a great feature for anyone who carries their mod in their pocket or purse. I am guilty though of forgetting I turned keylock mode on and not understanding why my vape suddenly isn’t working.

Safety Features

Vaporfi has included a couple of nifty safety features that we definitely appreciate. There is a 10-second safety lock that will stop your vape from firing if the button is held for longer than 10 seconds. The last thing you need is your coil burning out because you set a book on top of your mod. There is also a battery low lock that will warn you when your battery is low and will stop the mod from firing when the battery is almost drained.

Cheat Sheet

  • 5 clicks of the power button will turn the mod on/off.
  • 3 clicks of the power button to access the different modes. Press the positive button to cycle through modes, the negative button to move through that mode’s options, and the power button to apply changes.
  • The positive and negative buttons will adjust the settings of the selection you are currently editing.
  • You can switch between Celsius and Fahrenheit by setting the temperature to the max (600ºF/315ºC) and then pressing the positive button again.
  • Access TCR memories by holding the power and positive button for 5 seconds while the device is off.
  • Change memory’s TCR setting with the positive and negative buttons and press the power button to accept changes.
  • Hold the negative and power button to activate stealth mode.
  • Hold the positive and negative button to activate keylock.

For those of us that learn better by sight, we have included a video from Vaporfi Below.


  • Very Flexible Mod
  • Easy to Use
  • Strong Craftsmanship
  • Strong Flavor and Vapor Production
  • 4 Modes (Power Mode, TC, TCR, and Bypass Mode)
  • External Battery and USB Passthrough Charging
  • Sub-Ohm Capable


  • Edges on Battery Door Can Be Uncomfortable to Some
  • TC mode supports 3 coil metals
  • Only Comes in Two Colors

Review Wrap-Up

the vex produces strong flavors and large clouds

This was a fun review to do! The Vex 75 performed exceptionally well. We have a pretty high bar for VaporFi and they did not disappoint. Everything from the potent flavor and vapor clouds to its multiple charging options were all on point. We really hope that Vaporfi sets a new standard for flexibility and options in the vaping industry. Thank you so much for reading and sticking with us! If you enjoyed this article or feel there was something we missed leave us a comment. We love to hear from our readers!