Joyetech Cuboid Mini Kit Review

We take Joyetech's new all-in-one kit, the Cuboid Mini, for a vape.

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Joyetech Cuboid Mini Colors

Joyetech Cuboid Mini Kit Intro

For beginning and intermediate vapers, all-in-one kits can be a terrific choice as a way to get started for a beginner or to get a leg up in vaping for someone who’s logged some flight time and wants a better vape. Joyetech’s Cuboid Mini Kit falls into the latter category. I wouldn’t recommend it to a first-time vaper just starting out, but for an intermediate vaper who wants to move up in the sophistication and quality of his/her vaping experience, the Kit seems tailor-made.

The Cuboid Mini Kit consists of a 80W temp-control Cuboid Mini box mod — a smaller version of Joyetech’s full-size Cuboid 220W TC that uses dual 18650s. The Cuboid Mini is svelte and sleek, powered by a non-removable 2400mAh Lipo battery that’s USB recharged. The Cuboid Mini atomizer — essentially a sub-ohm tank — is custom designed for the Kit. When mounted on the Cuboid Mini mod, the two match perfectly, making for a seamless, one-piece appearance.

The Kit includes a generous supply of different coil heads — a stainless steel vertical coil head, a Clapton coil head designed for lower wattage, a new Notch coil head meant for higher wattage, and what Joyetech is calling an RBA head. That’s something of a misnomer, because the RBA head included in the package I received is really a vertical coil head, apparently meant to be rebuilt. (Two hex screws and a hex wrench were in the parts bag, implying that Joyetech has a more typical RBA deck with posts and screws for this atomizer, but my package contained only the RBA head.)

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Joyetech Cuboid Mini Kit Specs and Features

Joyetech Cuboid Mini Kit Content
  • 1 x Cuboid Mini 80W TC Mod
  • 1 x Cuboid Mini Atomizer
  • 1 x Notch Coil (0.25Ω)
  • 1 x BF SS316 (0.5Ω)
  • 1 x BF Clapton (1.5Ω)
  • 1 x BF RBA
  • 2 x Mouthpieces
  • 1 x Micro USB Cable
  • 1 x User Manual
  • 1 x Warranty Card
Joyetech Cuboid Mini Taken Apart
  • Dimensions: 35.5*22.5*50mm
  • 2400mAh Internal Battery
  • Wattage Range:1W – 80W
  • Temperature Range: 200°F – 600°F / 100°C – 315°C
  • Resistance Range:
    • 05Ω – 1.5Ω (VT Modes)
    • 1Ω – 3.5Ω (VW/ByPass Modes)
  • Output Modes: VT-Ti / VT-Ni / VT-SS316 / ByPass / TCR/ VW
  • Compatible With Multiple Atomizers
  • Large OLED Screen
  • Firmware Upgradeable
  • Stainless Steel Threads
  • Charges Via Micro USB
  • 5mL Tank Capacity
  • TFTA Tank Technology (Top Fill Top Airflow)
  • Convenient Top Fill Feature
  • Detachable & Washable Structure
  • Compatible With the Notch Coil and BF Coils

Notable Remarks

Price

The Cuboid Mini Kit is available online for about $40-60 plus shipping. It’s new enough (as of May 19th) to not yet be offered by many online vendors, but that will change soon, no doubt. The low end of the price range is a very good deal, considering the quality, power, and four heads included in the package.

Thoughts

Joyetech Cuboid Mini

First off, this is a handsome setup. Matching the atomizer to the mod makes for an attractive unit that’s slim, easy to hold for any size hand, and good-looking (mine came in gray and black). Like the full-size 220-watt Cuboid, the design is clean and smart, with impeccable machining and build quality. Judging from looks alone, the Cuboid Mini Kit beats the heck out of most other all-in-one intermediate kits.

We don’t live by looks alone, however. Well, most of us don’t. Beauty had better be more than skin deep. And this is where the Cuboid Mini Kit runs into some problems.

The 2400mAh rating of the Lipo battery seemed to me an exaggeration on the high side. The battery indicator showed full right out of the package, so I just began vaping without attempting a recharge. After half an hour of vaping, however, using the Notch head at a moderate 55 watts, the battery indicator had gone from full to 4/5 drained, and I wasn’t even chain-vaping.

Perhaps a number of USB recharges will bring out the best of that battery, allowing for greater longevity, but it’s disappointing to get only half an hour of vaping the first time out before needing a time-consuming USB recharge. I understand why Joyetech chose a non-removable Lipo battery — even a single removable 18650 would have been impossible to fit in the slim design — but I just hate USB charging altogether. Even with passthrough capability, who wants to vape while tethered to a cord? I can understand how a first-time vaper would appreciate USB charging, since beginners don’t already own 75 high-drain 18650s as I do, but I sure hope that the performance of that Lipo battery improves over time.

Joyetech Cuboid Mini Tank Window

The regulating chip in the Cuboid Mini is apparently the same chip used in Joyetech’s VT and VTC Mini. This chip has been criticized for inaccuracy of resistance readings, but praised for the quality and stability of its temp control performance, especially with nickel wire (stainless steel wire is generally the most difficult to regulate in temp control for most of the chips on the market). Joyetech has had almost a year to tweak the programming of that chip, so I’m inclined to give it a pass, with a good grade.

I’ve read online a number of customer reviews of this kit with complaints about the mod overheating — not dangerously so, but enough to be uncomfortable and worrisome. In fairness, the unit I received for review got only mildly warm, even with constant use at fairly high power. Overheating is a problem some people have reported (including me) with the full-size 220W Cuboid, so I think it’s worth mentioning here as a potential concern with the Cuboid Mini. I won’t list overheating as a Con, since mine didn’t, but be aware that the possibility exists.

One Dreadful Problem

Joyetech Cuboid Mini Top Coil

Now we come to the most serious issue, one that could be change the entire tone of this review. The included user manual states that the atomizer can be filled with eliquid to the top of the tank’s window, but I’d strongly recommend against this. Vaping the Cuboid Mini with a full tank produced an initial five minutes of vaping with gurgling from the heads and nasty spitback. “Spitback” is the term used in vaping to describe a pop of boiling eliquid that shoots up the drip tip and into the vaper’s mouth To call spitback unpleasant is an understatement, since it can literally burn one’s tongue. Spitback occurred with both heads I tried — the RBA head and the Notch coil — but it was much worse with the Notch coil. The same problem happened again when I refilled the tank after an hour of vaping, even though I refilled it only 2/3 full.

Joyetech is apparently aware of this, since the package includes a spare drip tip with a partially-blocked airway that’s designed to minimize spitback. While that restricted drip tip does reduce the problem, it doesn’t eliminate spitback completely.

Joyetech Cuboid Mini Coil

It pains me to consider rejecting an otherwise wonderful Kit because of a single problem, but this is my dilemma. Is temporary spitback after filling or refilling a deal-breaker? I hate to say this, but I think it is.

Once the Notch head had broken in and stabilized so that gurgling and spitback stopped (after about five minutes of vaping), performance of the Cuboid Mini mod and matching Cuboid Tank were terrific. I preferred a moderate power level of 55 watts with the Notch head, but I took it up to 70 watts with no problems. With the RBA vertical coil head, the sweet spot was 40 watts. With the exception of the nasty spitback issue, the Cuboid Mini Kit offers an amazingly good vaping experience that rivals much larger, more powerful dedicated setups with more expensive, individually-purchased components.

I’m sad to report, however, that the spitback problem just kills it for me.

Likes

  • Handsome, slim design with matching tank
  • Good build quality and machining
  • Nice chip for wattage and temp control
  • Generally wonderful performance
  • Price is reasonable (especially from some online vendors)

Dislikes

  • Head gurgling and hot spitback temporarily after filling or re-filling
  • Lipo battery capacity (2400mAh) seems over-rated

Verdict

Joyetech is one of the giants among Chinese vaping manufacturers, a true juggernaut. They’ve been around for a long time and have learned from many mistakes along the way. The all-in-one Cuboid Mini Kit is a product that implements many of Joyetech’s hard-earned skills. The atomizer tank’s spitback problem is a horrible flaw, however. Even though the gurgling and spitback stop a couple minutes after refilling, it’s still a good deal worse than merely unpleasant.

In good conscience, I can’t recommend the Cuboid Mini Kit in its current form. If Joyetech fixes the spitback problem (and not just partially, by adding a cheap drip tip to the package), then I’d heartily recommend it to both beginning and intermediate vapers. Until then, however, the Kit gets a Thumbs Down from me.

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Bill Herbst
My name is Bill. I’ve been a dedicated vaper for five and a half years, having ended a 35-year addiction to tobacco cold-turkey on my first day of vaping. I live on the Oregon coast, in the tiny town of Florence, one huge sand dune away from the Pacific Ocean.