INNOKIN EZ Tube and Zenith Minimal Kit Review

Design & Build Quality

It’s been a while since I’ve reviewed a vape pen but I can still remember what makes one good! For the design of the EZ Tube, Innokin hasn’t done anything too crazy; it’s a tall, round, tube shaped device. The shape and size are similar to many other vape pens on the market with the EZ Tube coming in at 90mm tall and 25mm in diameter. With the Zenith Minimal tank, the whole thing is 139.2mm tall.

The EZ Tube feels a bit chunky in the hand but that’s to be expected with a ‘true’ vape pen. This isn’t a pen shaped pod vape — it’s the real deal. And when you’re putting a 510 connector and a real subohm tank on a device, it’s going to be larger than a pen-shaped pod device.

While it might be chunky and decently heavy, it feels really great to hold. The EZ Tube doesn’t feel cheap or fragile but rather feels well-made and durable. I’ve been using the Nightfall Black and Silver Glow colors and the paint even feels good. It’s a satin-metallic finish and it has held up like a charm during my day-to-day use with no fading, scratching, or flaking.

There are six other colors available and I just want to say that Innokin did me wrong by not sending me some of those! My black and silver units look great, don’t get me wrong, but the other colors just look like they really pop. Crimson Red looks especially good and would have been more my style, but what can you do, right?

There’s a flat side to the EZ Tube and this is where the power/firing button is located. It’s a square button that responds with an auditory click and, although it’s made of plastic, it feels good.

The top of the EZ Tube is flat with a 510 connector in the center. The pin is gold plated and spring-loaded to ensure a good connection with the tank.

Now the opposite end of the EZ Tube is where it gets interesting. To adjust the wattage, you click the fire button twice and then turn the dial. This will increase or decrease the wattage in 0.5W increments. The dial is stepped and each step produces a satisfying ‘click’. Innokin did a really great job with the feel and construction of this dial so I have to get them credit here.

But a dial on the bottom of a vape pen is nothing new, even if it is well done. It’s been done in the past on other devices. What is new is the addition of a display on the bottom of the pen.

The display is really crisp and shows your wattage level, puff time, and battery life. However, it’s really tiny and honestly, it’s an awkward spot to put it. It’s on the opposite end of where you draw so you have to flip the device 180° to check your puff time or wattage output. 

An awkward display is better than no display though and it’s invaluable to have on an adjustable wattage device. I really disliked older vape pens with adjustable wattage dials but no display as I always felt uncertain about exactly where my wattage was set. This display, despite the strange positioning, solves that issue.

Battery & Charging

The EZ Tube features a 2100mAh battery and charges with Type-C charging. The charging port is located on the opposite side from the firing button and charges the device at 1.5A.

There’s an LED ring that lights up just above the wattage adjustment dial. This ring will glow random colors when adjusting the wattage but will relay your battery charge level when you vape. I like this because it’s an easy way to see how much battery is left without having to check the display (which doesn’t have a percentage indicator anyway). The battery levels are:

• Green: >30%
• Yellow: 10-30%
• Red: <10%

When charging, the LED will light up red while the charge level is below 90%. Once it’s above 90%, the LED will switch to green. When fully charged, the LED will shut off completely.

Zenith Minimal Tank

The Zenith Minimal tank pairs up perfectly with the EZ Tube so I can see why they put these two together for this kit. The Zenith Minimal has a 25mm base diameter which fits perfectly onto the 25mm diameter of the EZ Tube.

The design of this tank also suits the EZ Tube to a tee. It’s called the Zenith ‘Minimal’ for a reason; it’s simple with a no-frills design that is, well, minimal. That’s not to say that it isn’t a nice tank, it’s just a little plain. 

There’s some engraved lines on the top cap to add a bit of grip, as well as two bands of knurling (one above the glass and one below it). Innokin is also engraved on the airflow control ring, along with “— Z —” for Zenith. 

What I like the best about this tank is that you get three drip tips for different styles of vaping. There’s a thin MTL drip tip, a medium bore ULTEM drip tip for RDL, and a wide bore drip tip for DL. These drip tips really change the experience when paired with the right coil and properly adjusted airflow, allowing me to vape MTL, RDL, or DL.

Speaking of coils, two are included in the kit: a Z-Coil 0.8Ω for MTL, and a Z-Coil 0.3Ω for RDL/DL. These coils are a bit different from others because they have the 510 connector built into them as one piece. The base of the Zenith Minimal tank (which is also where you’ll find the airflow adjustment ring) has a hole in the center that the 510 connector on the coil sticks out of.

If you really want to, you can use the Zenith Minimal without the base piece but it looks a little weird. Not to mention you lose out on the airflow control adjustment which severely hampers the quality of the draw.

The coils are easy to install. First, unscrew the base of the tank, then simply push fit the coil into the tank and into place. There are flat edges of the coil that have to be lined up but otherwise it’s a straightforward installation. The only thing to be conscious of is the little black o ring which sits on the coil around the top of the 510 connector. This o-ring seals the hole in the middle of the base so make sure it doesn’t come loose.

The Zenith Minimal can hold up to 2ml of ejuice. It’s a small capacity tank by any standard but it’s most noticeable when using the kit for RDL/DL vaping. The ejuice goes fast and I ended up having to refill at least once a day when using the 0.3Ω coil. The 0.8Ω coil fares better on ejuice but it still felt like I was refilling pretty often.

Filling is done by removing the top cap with a quarter turn. There’s a silicone gasket that lines the top of the fill port and a self-closing membrane for filling. Adding ejuice to the tank is as simple as inserting the bottle nozzle into the membrane, filling, and removing it. I didn’t have any leaking from this area and things stayed dry around the top cap.

The airflow control ring on the Zenith Minimal is perfectly made for the versatility that it provides. There’s three pin holes of different sizes and one large airflow slot. The airflow can be adjusted to leave only the large slot open, leave only the three pin holes open, closed completely, or anywhere in between.

Performance

After using the EZ Tube and Zenith Minimal tank for over two weeks now, I have a lot of good things to say. I also have a few not so good things to say. But overall, it’s one of the best vape pens that I’ve used recently and definitely one of the better vape pens to come out in the past one or two years.

Since this kit is so clearly aiming to fill the needs of MTL, RDL, and DL vapers alike, I’ll start with how it does. It’s uncommon to find a vape that can effectively be used for all three styles of vaping but this kit does just that. It’s surprising really because I’m used to most devices being good only for MTL/RDL or only for RDL/DL but the EZ Tube kit pulls it all off.

There’s a catch though, albeit not a big one. In order to effectively switch styles and get the best experience, you’ll have to change the coil, the airflow, and the drip tip. I tried just changing the airflow while using the ULTEM RDL drip tip but the experience isn’t as good. Here’s how I found the coils, drip tips, wattage, and airflow was best used:

• MTL vaping: 0.8Ω coil, MTL drip tip, 16.5W. Set the airflow to 3 pin holes open, with a bit of the wide airflow slot open for a loose MTL. Leave only 2 to 3 pin holes open for a tight MTL draw.
• RDL vaping: 0.8Ω coil, ULTEM RDL drip tip, 18W. Set the airflow to just leave the 3 pin holes open with some of the wide airflow slot open. Can be slightly adjusted to your liking.
• RDL vaping: 0.3Ω coil, ULTEM RDL drip tip, 33W. Set the airflow to 3 pin holes open with some of the wide airflow slot open. Can be slightly adjusted to your liking.
• DL vaping: 0.8Ω coil, wide bore DL drip tip, 37W. Airflow slightly closed from the slot being wide open.

I got great flavor from both coils and with all three vaping styles, as described above. It took about a full tank of ejuice before each coil really started delivering maximum flavor but from there on it was excellent.

One big problem that I experienced was leaking on the first fill with each coil. This happened with a 60VG nic salt ejuice with the 0.8Ω coil and also with a 70VG ejuice with the 0.3Ω coil. I had two of each coil so once I realized they were going to leak out on the first fill, I put a minimal amount of ejuice into the tank on the first fill to minimize wasted ejuice. After the first fill though, the coils never leaked again so it’s odd to say the least.

Verdict

The EZ Tube and Zenith Minimal tank combo is one of the best vape pens that I’ve used recently and definitely one of the best vape pens to come out within the last two years. Its versatility is its strongpoint, allowing you to vape in any style that you want. Whether that’s MTL, RDL, or DL, you can do it with this kit – as long as you use the correct drip tip, coil, and airflow setup.

The adjustable wattage dial works really well and the quality of the dial matches the rest of the device. It’s just a quality vape pen that feels good to hold, adjust, and use. The bottom location of the display is a bit awkward and would be better placed on the face of the EZ Tube. It works where it is and it’s a unique and interesting placement, it’s just not as intuitive as I would like.

The only major problem I had with this kit is the leaking of ejuice on the first fill with each coil. It didn’t leak at all after the first fill though, which is strange but good. If Innokin can figure out this issue then it would make the EZ Tube kit a no-brainer of a purchase. As it stands, the leaking is something to keep in mind before you purchase this kit and when you fill for the first time.

Overall, the EZ Tube and Zenith Minimal is a good combo of a vape pen kit and it’s easily the most user customizable and versatile vape pen on the market right now.