Vaporesso GTX One kit: spec sheet and real use
An 83 g tube, an 18 mm tank and two coils in the box: the Vaporesso GTX One kit belongs to that class of device you judge on three lines of a spec sheet. Except that one of those lines does not say the same thing depending on which page you read, including on the manufacturer’s own site. The detail looks trivial and it decides how you set the device up every day.
What the Vaporesso GTX One kit actually contains
The kit pairs a tube mod with a 2000 mAh built in battery, capped at 40 W, with the GTX Tank 18. Two coils from the GTX platform are supplied, a 0.8 ohm mesh and a 1.2 ohm mesh, and the tank arrives at the 2 ml permitted for refillable tanks in the United Kingdom.
The whole thing is designed for mouth to lung, meaning a tight two stage draw. The supplied coil values confirm it, since neither drops below 0.5 ohm, which is direct lung territory.
That positioning explains why this kit has stayed on British shelves so long. Mouth to lung hardware dominates here because of the 2 ml tank cap and the 20 mg/ml nicotine ceiling in 10 ml bottles, and a slim tube suits those proportions better than a box does.
Full spec sheet of the Vaporesso GTX One kit
The figures below come from the official Vaporesso sheet, completed by physical measurements taken in an independent bench test of the device.
| Item | Value |
|---|---|
| Output | 5 to 40 W |
| Battery | 2000 mAh built in |
| Charging | Type-C, 2 A |
| Screen | 0.69 in OLED |
| Mod dimensions | 127.5 x 22.7 x 29.3 mm |
| Mod weight | 83 g |
| Tank | 2 ml in the United Kingdom |
| Tank diameter | 18 mm |
| Coils supplied | GTX 0.8 ohm mesh and GTX 1.2 ohm mesh |
| Modes | Wattage, voltage, automatic |
The notable line in that table is the 18 mm tank diameter, well under the 22 to 25 mm standard of direct lung atomisers. It is what gives the Vaporesso GTX One kit its slim tube silhouette rather than a box profile, and what makes it pocketable in a shirt rather than a coat.
The GTX Tank 18, the heart of the kit
The tank counts for more in daily use than its dimensions suggest, because it sets the draw, the consumption and the refill frequency. The mod only sends it power.
Independent measurement puts it at 48.65 mm tall for 18 mm across and 31 g on the scales. Capacity is the line to read carefully: British stock is filled to 2 ml, and any figure above that belongs to another market and describes a tank you cannot buy here.
Filling is from the top, with no full teardown of the tank. The airflow ring tightens or opens the draw, which allows a gradual slide from a tight mouth to lung draw towards something more airy without changing anything else.
That adjustment, more than wattage, is what moves the sensation. The same 0.8 ohm coil with the airflow closed and with it open produces two distinct results at identical power, which is worth trying before deciding a coil does not suit you.
GTX coils, and a documented disagreement in the ranges
The kit sits on the GTX platform, shared with several other devices from the brand. Both supplied coils belong to it, but their recommended wattage ranges are not identical from one Vaporesso source to another.
The GTX ONE product page gives 12 to 20 W for the 0.8 ohm coil and 7 to 11 W for the 1.2 ohm. The dedicated GTX coil platform page from the same manufacturer gives tighter values, 12 to 16 W for the 0.8 ohm and 8 to 12 W for the 1.2 ohm. The gap reaches 4 W at the top of the 0.8 ohm range.
We are not going to arbitrate between two documents both published by Vaporesso. The cautious reading is to start at the bottom of the narrower interval and climb one watt at a time until the result suits you. That method is the right one on any new coil anyway, whatever the box printed on the sleeve.
The practical consequence for a British buyer is small but real. Coil sleeves sold here carry a printed range, and that printed range is the one to trust over any figure found online, including a figure found on this page.
What the mod is able to read and drive
The electronics accept a far wider resistance range than the two supplied coils occupy. Bench testing puts recognition at 0.15 to 5 ohm with an output voltage of 0 to 4 V, on a top plate limited to atomisers of 22 mm maximum.
That latitude is useful. It lets you fit another small diameter 510 atomiser without the box refusing to read the value. It does not change the 40 W ceiling, which remains the real limit on use.
The three available modes, wattage, voltage and automatic, cover the essentials without crowding a 0.69 inch screen. The underlying logic is the one described more broadly in our guide to reading a box mod spec sheet, where power source and resistance range come ahead of the mode count.
GTX One or GTX One Pro on British shelves
Vaporesso has since published a rework of this kit, and the differences read figure by figure. The battery goes from 2000 to 3000 mAh, the screen from 0.69 to 0.87 inch, and the format stretches to 137.25 x 23.2 x 30.05 mm for 140 g.
Output does not move. Both generations stay capped at 40 W and both tanks are supplied at 2 ml here, so the choice between them is about runtime and weight rather than performance. UK listings often carry the Pro more prominently, simply because it is the current model, which does not make the original a worse device.
Where the older kit still earns its place is the tube format and the lower weight. Where the Pro earns its own is a full extra day between charges for most people, which is the kind of difference you notice more than a wattage figure. Both sit on the same GTX platform covered across our Vaporesso box mod comparison.
Frequently asked questions
Can the GTX Tank 18 go on another mod?
Yes, the thread is a standard 510. The only thing to watch is looks, since its 18 mm diameter will leave a visible gap on a top plate designed for 25 mm atomisers.
How long does a GTX coil last?
Mostly it depends on the sugar content of the e-liquid and the wattage used. A heavily sweetened liquid gums up a coil in days, a neutral one runs far longer at the same power.
Should a new coil be primed before use?
Yes. A few drops of liquid directly onto the visible cotton, then ten minutes with the tank filled before the first puff. Without that step the cotton heats dry on the very first fire.
Can the device be used while charging?
The 2 A Type-C port allows use during charging on this type of device. Temperature rises more than during a simple charge, which is not ideal for the lifespan of a sealed cell.
What should I do if the tank leaks through the airflow ring?
Check the coil seating first, neither forced nor loose, then the condition of the base seal. A poorly seated coil lets liquid past the central chimney before it finds its way out through the air inlet.
Is the Vaporesso GTX One kit still worth buying
The kit remains relevant for straightforward mouth to lung use, with no cell handling, in a format that fits a shirt pocket. Its real asset is neither output nor capacity but access to the GTX coil platform, which is widely stocked in the United Kingdom and shared with several current devices.
The one reflex to keep is to read the wattage range printed on the coil sleeve itself rather than trusting a value found online, since the documentation for the Vaporesso GTX One kit does not print the same intervals everywhere. Pair that with a 2 ml tank and a coil chosen for the draw you want, and the device does exactly what it was designed to do. The rest of the tank side of the catalogue is gathered in our atomisers section.
Editorial content for adult readers only. Vaping products usually contain nicotine, a substance that causes addiction. Not for sale to under-18s in the United Kingdom. This article is not a buying recommendation.
