Apparently, Sigelei has to meet an annual quota for new mod designs, because its latest – the Fuchai VCIGO K2 RDA Mod Kit – is another amalgamation of design elements, built around its proven Fuchai core chipset. We’ve reviewed a lot of Sigelei devices over the last six months, to varying levels of success.


The VCIGO K2 lands somewhere in the middle of the pack, winning points for uniqueness and performance, but losing them for overall design and odd pairing choices.

Let’s dive in a little closer.

The Sigelei Fuchai VCIGO K2 RDA Mod Kit Review

One thing we discussed in our preview was how the dual-18650 VCIGO K2 had a “toy-like appearance.” For a company that recently put out a transparent Box Mod with an LED “Z” on display, the VCIGO K2 might seem tame by comparison. But after a week using the Mod, I stand firm on my assessment – the VCIGO K2 is bright, colorful, and might be too playful for an adult device. Maybe it’s just me, but I wasn’t thrilled with the looks.


One thing I didn’t notice in the preview was the replaceable rubber band that goes around the base of the Mod. The replacements we received all seemed to be slight variations on the same color scheme, so I didn’t see much of a purpose. But for those who want to personalize the two-tone VCIGO K2 a little further, this could be a selling point.


But overall, the VCIGO K2 is a hybrid of several longstanding Fuchai Mod design elements, such as the multicolor TFT screen from the Fuchai Color, the comprehensive TC suite from the Fuchai Duo. However, I incorrectly reported there would be a changing LED light strip, like the one on the Fuchai GLO. Instead, the replaceable rubber bands take the place of this feature on the VCIGO. It’s probably for the best, since the VCIGO is already a bold-looking Mod without a light show.


I should note that Sigelei decided to place the 0.96-inch TFT screen in close proximity to both fire keys, which obstructed my view of the screen while firing. Hardly a “negative” but worth mentioning for those who are particular about view-ability.


Another item of note is what initial documentation called “re-programmable” buttons, which turned out to be two fire keys – one on the side of the Mod, and the other in a traditional trigger position. These can be turned off and on, or given another purpose, which worked well when giving the secondary button an “action” designation, but the idea of a truly customized control scheme was a little overblown here.


The rest of the VCIGO’s appearance is rock-solid. Underneath the bold colors and playful exterior comes a well-crafted and machined Mod, with secure connections and a surprisingly snug battery door. The zinc alloy frame feels extremely durable, and the VCIGO feels like it could survive a hefty drop if needed.


Finally, the included Fuchai Cubic RDA has an odd, squared off shape, but the inside reveals a familiar velocity-style build deck, and an ultra-deep juice well. I’m not much of a dripper, but my favorite RDAs are the ones that keep things simple, and require fewer fills – two marks checked off by the Cubic.

Element Vape

Operating the Sigelei Fuchai VCIGO K2 RDA Mod

Holding the VCIGO K2 is surprisingly comfortable. Even with the two fire keys, odd screen placement, and curved top, the Mod sits extremely well in the hand. The zinc alloy frame is sufficiently weighty, and balanced. Reaching either fire key is natural, though trying to make one-handed adjustments was a little difficult with the cramped up/down button placement.


The TFT screen should be familiar to most vapers by now. It’s a LITTLE crowded, given the space, but the multicolor scheme allows vital information to stand out well, eliminating any confusion.


Once in the menu system, it’s a very familiar experience (provided you’ve used a Fuchai in the last few years, that is). The three-click/fire key menu access is standard fare, and once in the menu trees, most users should quickly adapt to the basic functionalities.


But there’s quite a bit going on within. In addition to 230 watts of power in wattage Mode, the VCIGO K2 also features a full temperature control suite, five TCR memory slots, TFR adjustment, customized preheat settings, power/fire boost settings, 2.5-amp onboard charging, and a slew of other adjustments. But perhaps the most interesting is the return of straight voltage Mode vaping.


Now, I live in a little bubble in my corner of the universe, so I’m sure there are plenty of other straight voltage vape devices out there. But this is the first time I’ve seen it in a while. And you know what? It’s exactly as straightforward as you remember. Find a voltage, and fire away. It’s obviously less-precise than wattage adjustment, but all in all, this is a fine option for no-nonsense vapers who want to set it and forget it.

The Cubic RDA

With all the rounded edges and oddball curves of the VCIGO K2 RDA Mod Kit, it’s surprising Sigelei included the Cubic square RDA as part of the package. But the overall package is pretty cohesive when put all together.


As I mentioned in the preview, other than the squared-off shape, there’s nothing particularly EXCITING about the Cubic. But the performance of the bare-bones velocity-style deck and deep well was more than enough to keep me satisfied. Using the surprisingly good Kanthal coils included in the Kit, the Cubic offered up a potent mix of flavor and vapor, in a well-matched Kit.


While the included coils were quite good, they were a little small for the available space. I swapped in a more complicated set, and was able to move and adjust with a ton of room to spare. Build enthusiasts may not love the dated velocity deck, but no one can argue with the real estate.


Is the Cubic going to make you forget the Dead Rabbits and VandyVape Pulses of the world? Not likely. But for simple, uncomplicated building and performance, this proven deck design (with room for more complicated builds) means there won’t be any unwanted surprises when using the RDA – either on the VCIGO or other bold looking Mods.

Vaping the Sigelei Fuchai VCIGO K2 RDA Mod

I very much enjoyed using the combination of the VCIGO K2 Mod and Cubic RDA, but I’m still a little confused why Sigelei chose this pairing. The Cubic is a standard RDA, but hardly a showpiece. Given the brash design choices used on the VCIGO Mod, I would have expected an equally bold new tank to come in the Box. There’s nothing wrong with the Cubic, but I wouldn’t tell you to rush out and buy one separately, either.


When used with other tanks, I was happy with the VCIGO’s performance. Other than a few misfires and stutter-steps at higher wattages, the VCIGO proved itself more than capable of handling any atomizer you throw its way, right down to its stated 0.05-ohm resistance limit. (Which is VERY accurate, I might add. The VCIGO threw warnings the INSTANT I teetered below this limit.)


In temperature control, this seemingly power-focused Mod showed off its delicate side, as the Fuchai chipset offered flawless, steady power using a wide range of test coils. TCR settings were easy to adjust, and proved handy when the VCIGO had a little trouble reading some of my blended twist coils. It’s safe to say the Fuchai brand’s TC concerns are a distant memory, as the VCIGO (and all recent Sigelei Mods) are more than capable of pinpoint temp control.


In voltage regulation Mode, the Fuchai did as asked. I will admit the Mode seemed a little antiquated in 2017, but the steady flow of voltage offered a simple, direct kick when I needed it. It might not be my preferred form of vaping, but I love having it as an option once more.

Wrapping up, and Score…

Let’s cut to the chase – the Sigelei Fuchai VCIGO K2 is a good Mod. It hits its marks, has a boatload of options, and brings a lot of performance to the table for a VERY good price. If performance was my only barometer, the VCIGO Kit would get a solid A- on its own, no question.


But as an overall package, this Mod and Kit baffle me a bit. Placing the display in a spot where it’s easily obstructed by a firing thumb is an odd choice. As is the inclusion of a basic RDA when Sigelei’s  unique Revolver tank would have been a better design match. Again, there’s nothing wrong with the included contents, but I feel like if Sigelei was going to go all-out with the bold VCIGO, then they should have done just that.


Still, as a high-ceiling Mod that includes everything a vaper needs to get started, short of batteries and e-liquid, it’s really hard to argue the performance and value inside the VCIGO K2 Kit.


Sigelei Fuchai VCIGO K2 Mod score: B+

Sigelei Fuchai Cubic RDA score: B

Overall: B+

VCIGO K2 Specs and Contents

Sigelei Fuchai VCIGO K2 RDA Mod specs:

  • Size: 87*44*30 mm
  • Main Material: Zinc alloy
  • Display: 0.96” TFT color screen
  • Wattage Range: 10W-230W
  • Temperature Range: 100°C-300°C/200°F-570°F
  • Max Output Current: 35A
  • Battery Support: 2*18650
  • Modes: POWER/SS(304/316/317)/Ti1/Ni200/TCR
  • Resistance Range: 0.05Ω-3.00Ω
  • Coil Supporting: Kanthal/SS(304/316/317)/Titanium/Ni200/TCR
  • Voltage input: 6.4V-8.4V
  • Voltage output:1.0V-7.5V
  • Charging support: DC 5V / 2.5A


Sigelei Fuchai Cubic RDA specs:

  • Dimensions: 1-1/2″ x 7/8″ (including Drip Tip and Threads)
  • 22mm Diameter
  • 510 Threaded
  • Dual Post Velocity Style Build Deck with Four Post Holes
  • Large Build Deck allows for Easy and Varied Builds
  • Square Design
  • Dual Airflow Slots
  • Ultra Wide Bore Drip Tip
  • Includes Spare O-Rings, Spare Screws, Cotton Pad and Allen Key


Sigelei Fuchai VCIGO K2 RDA Mod Kit contents:

  • 1 x VCIGO K2 Mod
  • 1 x Cubic RDA
  • 2 x Coil
  • 1 x Cotton
  • 1 x Screwdriver
  • 1 x USB Cable
  • 1 x User Manual
  • 1 x Warranty Card