Review: UWELL Crown 4 Checkmate Kit

Today we’re reviewing a vape mod and tank – the UWELL Crown 4 Checkmate system. To say I was in dire need of an upgrade to my vape setup was an understatement so while in San Antonio visiting my beloved neuro-sister Laina I went ahead and bought a new setup recommended to me by the attendant on duty at the previously reviewed Valkyrie Vapor Shop.

So what’s included in the starter kit? Everything you need except for juice, batteries and a charger. The kit includes the mod itself, 5 mL Crown 4 tank pre-loaded with a 0.4 ohm kanthal dual vertical coil, spare gaskets, drip tip cover, optional 6 mL “bubble” glass and a 0.2 ohm kanthal dual vertical coil, 3′ Micro USB charging cable and user manual.

Concerning the mod itself, the power range is from 5-200 watts in power mode (limited by max voltage, obviously) and 200-600 degrees F (or 100-315 degrees C) in temperature control mode. The output voltage ranges from 0.7 to 8 volts and reads coils ranging in resistance from 0.1-3 ohms in power mode and 0.1-1 ohm in temperature control mode. While it is possible to use the unit as a passthrough (i.e. vape while charging), the manufacturer does not recommend this practice. I am unsure if this device has smart charging/overcharge protection (it is not listed in the manual) so until I hear otherwise I would not recommend overnight charging, etc.EDIT 4/24/19: UWell has assured me this device does have overcharge protection. Of course, you can buy extra batteries and an external charger if you wish, but always remember batteries stay together as a set and never mix batteries.

The mod will accept two high-drain 18650 rechargeable batteries with a 3000 mAh capacity for a very high battery capacity. The battery cover is held on by a magnetic enclosure, as seen here:

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Charging with the Micro USB cable from a 5V/2A wall charger unit is fairly fast – approximately 2 hours from about 30% to a full charge. As with all rechargeable batteries it is not recommended to discharge them fully prior to recharging and also don’t overcharge. One other word to the wise – do not, and I repeat, DO NOT use an iPhone wall plug to charge the device. Those are only rated for 1 amp. Not only will charging take longer but you’ll over-stress the iPhone charger, leading it to get very hot and risk a fire.

So that’s all the technical stuff, now let’s discuss aesthetics. The fit and finish are top-notch. This system is available in a variety of colors to suit your own personal decor. The silver version was what the shop had in stock when I bought it, which is visually striking and high contrast:

57533070151__4b50d754-ac06-4a53-9666-3d6d0e62c9f7The filigree is visually interesting, clean and well-executed. The 5 mL glass has a streamlined appearance with the metal base and cap, which I prefer over the 6 mL glass which has the appearance of a “bubble.” I prefer the streamlined look of the 5 mL, though if you vape a lot it might be worth sacrificing some aesthetics for higher capacity (or, if you just like the look of the bubble glass; beauty is in the eye of the beholder after all). EDIT 4/8/19: Since I’ve found I need the extra capacity I’ve switched the glass out for the 6 mL bubble, sacrificing aesthetics slightly (to my eye):

The base of the unit is fitted with rubber “feet” as to not damage any delicate surface you might set it down on:

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As far as accessing the built-in functions of the system, it’s very simple. The unit is 5 clicks on/off of the power button within two seconds. The +/- buttons on the bottom can be used to adjust your wattage (power mode) or temperature (TC mode). The system has various protections built in, from overheat protection, short-circuit protection, low battery protection, reverse polarity protection and you can lock certain functions or all functions with the prescribed combination of button inputs as well as switch between power and TC mode. Also, the mod will cut off after 10 seconds of holding the fire button down.

The tank is a top-filling tank so you can get it really full as opposed to a bottom-filling tank. To fill the tank simply turn the cap 90 degrees counterclockwise, remove fill and replace. Replacing the coil is just as easy and is accomplished by removing the base and simply pulling the coil out and pressing a new one in. Of course, always remember to prime the wick prior to installation and even then let is soak for a few minutes prior to vaping. Whereas the tank has a delineated “minimum” line, I wouldn’t recommend taking it down this far. Always keep the juice at or above the top of the wick hole for maximum saturation to avoid dry hits.

Now, onto the part you’ve all been waiting for: actually using the device. The device has a nice heft and weight in the hand without being too heavy – it definitely feels solidly built.  The side-mounted fire button can easily be actuated and accessed no matter how you choose to hold the device. This is going to sound very Texan of me, but for me it feels most natural to hold the device as one would hold a handgun or pistol and fire the unit with my “trigger finger” (I told you that would sound Texan!).

The device easily produces thick, rich, flavorful clouds of vapor. I have only used the dual vertical coils personally (as I prefer kanthal coils for safety reasons), so I cannot comment on the mesh coils or any other temperature control coil. The manufacturer specs 60-70 watts for the 0.4 ohm coil using full airflow, however I found this to be too hot for my personal taste (note that temperature is subjective). I found I liked this coil at 50 watts instead, with fully open airflow:

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The 0.2 ohm vertical coil is speced for 70-80 watts, however again, I found that to be too hot for my taste. I settled on 60 watts for this coil as it yielded a cool, smooth vapor, again with a fully open airflow:

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I did get a bit more intense flavor and cloud from the 0.2 ohm coil, hence I’ll settle on it. Again, I’ve not tried the other coils for reasons mentioned above.

While it doesn’t do much to talk about battery life and coil lifespan as those vary so much from person to person depending on power setting, how much you vape, type of juice, etc. – for me I got a solid 2 days of vaping on a single charge and a coil lasts me about 10 days using an 80/20 VG/PG juice that’s actually pretty dark in color. I’m not a very heavy vaper though (maybe 1 tank/day) so use that to gauge what your own expectancy should be.

Maintenance and cleaning are very simple – just wipe down with a dry cloth every so often and dab up any excess juice in the drip tip with a paper towel. Due to the design of the tank and coil, this tank does not leak, which is a real plus especially for someone coming from bottom-fill tanks where the coil directly touches the heating element on the mod.

So, with all that, can I find any real drawbacks in the system? Maybe a couple of minor ones. First is what I assume to be the lack of overcharge protection (man it’d be nice to be able to charge overnight!). Second you can only adjust power, etc. in whole number increments. Usually this is precise enough, but some might like something in between there. Other than that I don’t know as though I can find fault with the system, unless I were to get really technical as some reviewers can.

And that’s about it! The bottom line this is an excellent mod and tank system either for someone just getting into sub-ohm vaping or an experienced vaper. I’m very well pleased with it and I think you will be too. Thanks to Josh at Valkyrie for recommending this system to me! I’d easily rate it a 4.75/5 – it vapes great and just plain looks cool.

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