G Pen Elite II
Pros
- Full ceramic chamber, with nothing in the vapour path that adds a taste
- Temperature set to the degree, on the device rather than through a phone
- Draw-activated convection boost on top of a conduction oven
- USB-C, full in about 90 minutes from a 2100 mAh cell
- Three-year warranty if you register it
Cons
- Dry herb only — no concentrates, and the chamber is unforgiving about it
- Half-gram chamber is wasted on small loads
- The spiral cooling path collects resin quickly and needs real cleaning
- Sixty minutes of heating is optimistic with the boost switched on
- Batteries are excluded from the warranty, as usual
What the Elite II is
A portable dry herb vaporizer about the size of a chunky marker, 4.6 by 1.2 by 1.1 inches, driven entirely from a small colour display on the front. It replaced the original Elite and the change that matters is inside: the chamber is ceramic all the way round rather than metal with a ceramic lining.
The dual heater, explained
Grenco call it a dual heater and the description is fair. The chamber is a conduction oven, heating the flower by contact with the ceramic wall, and there is a convection element that adds hot air on top of it. Most portables are one or the other; doing both is a way of getting some of convection’s evenness without giving up conduction’s speed.
What convection boost does
It is switched on in the settings menu and it fires when you inhale rather than running continuously. The practical effect is that the first draw of a session is not noticeably weaker than the third, which on a pure conduction oven it usually is. It costs battery, and it is worth the battery.
Ceramic, and why it matters
Follow the air from the chamber to your mouth and ask what it touches. Here it is ceramic, then a ceramic cooling path, then zirconia. None of those contribute a flavour of their own, which is the single biggest difference between this and the cheaper G Pen Pro.
Temperature control by the degree
Not four presets but a number you set, which is unusual at this size. The menu also carries the session timer, the haptic feedback, the screen brightness and the convection boost, so the device is configured on the device rather than on a phone.
Where 210 degrees sits on it
Useful context for whatever number you pick: the controlled work on vaporizer efficiency was run at 210 °C, about 410 °F, and at that setting four electric vaporizers recovered between 54.6 and 82.7 per cent of their total THC into the vapour. Decarboxylation was essentially complete in all of them. A dial that moves in single degrees is a nice thing to have; it is not what decides how much you get.
The display, and no phone
A full-colour screen with a three-button interface, a battery indicator you can read as a figure, and a menu that makes sense the first time. After the PAX 3, where the custom temperature and the session modes all live behind a phone app, being able to change everything on the device itself is a genuine relief.
Battery and charging
A 2100 mAh cell with USB-C fast charging, full in about ninety minutes. USB-C in this category is still not universal and it should be; it is the difference between a device you top up with whatever cable is on the desk and one that needs its own.
Sixty minutes, in practice
Grenco quote roughly sixty minutes of heating from a full charge. That is a heater-on figure rather than a session count, and with the convection boost enabled it is the optimistic end. Call it a long evening or several days of ordinary use.
The chamber holds half a gram
About 0.5 g, depending on how finely it is ground, which is large for a portable. A conduction oven wants to be full, so if you rarely load that much you will get better results from a smaller device than from running this one half empty.
Dry herb only, and they mean it
The manufacturer states plainly that it is for ground dry material and not for concentrates or liquids. This is not a warranty technicality. A ceramic flower chamber has no wick and no dish, so an extract put into it runs down the walls and into places you cannot reach.
The zirconia mouthpiece
Magnetic, and made of a ceramic that stays cool and adds nothing to the taste. It lifts off for cleaning without a tool, which sounds trivial until you have owned something where it does not.
The spiral vapour cooler
A ceramic path that makes the vapour travel further before it reaches you, shedding heat on the way. It works — the draw is noticeably less hot than a device of this size has any right to be — and it is also the part that collects condensed resin fastest.
Cleaning it properly
Let it cool completely. Isopropyl alcohol on a cotton bud around the screen and the silicone insert, and around the airflow hole in the mouthpiece. The insert comes apart and the spiral path lifts out, so both can be soaked rather than swabbed, then rinsed in water and dried.
The isopropyl burn-off step
Run it empty at its maximum temperature once before you use it again. Alcohol left in a ceramic path is alcohol you will otherwise inhale, and it is the step people skip and then blame the device for the taste.
Two years, or three
Two years against defects in materials and workmanship, extended to three if you register the device with the manufacturer. Batteries are excluded, as they almost always are, and so is damage from not cleaning or loading it properly. Registering takes a minute and adds a year, so there is no reason not to.
What the old review got wrong
Our previous version of this page listed Wi-Fi connectivity among the features, describing usage tracking and sharing with friends. We cannot substantiate it: the manufacturer documentation describes the device entirely through its onboard screen and says nothing about connectivity, and retailer copy contradicts itself. It is removed rather than restated. Buy this device for the oven and the screen, not for anything wireless.
Who it suits
- Anyone who wants per-degree control without a phone in the loop.
- Anyone who packs a full half-gram and wants an oven built for it.
- Anyone who has had enough of tasting a silicone mouthpiece.
Who should look elsewhere
- Anyone buying for concentrates, which this will not do at all.
- Anyone loading a tenth of a gram at a time, who wants a smaller chamber.
- Anyone who wants a decade of warranty, which is the PAX 3 argument rather than this one.
For how the category works in general and what the specifications actually mean, start with vaporizers.
Verdict
The best flower device Grenco make, and the one worth paying for. A full ceramic chamber and a ceramic cooling path mean the vapour arrives tasting of what you put in, which is not true of the cheaper pen in the range, and per-degree control on an onboard screen beats hunting for a phone. Buy it if you fill a half-gram oven and care what it tastes like. Do not buy it for concentrates, which it refuses, or expecting the decade of warranty that a PAX 3 carries.
Questions people ask
Can the G Pen Elite II be used with concentrates?
No, and the manufacturer says so directly: it is built for ground dry material only. The chamber is a ceramic flower oven with no wick and no dish, so an extract put into it runs down the walls into places a cotton bud cannot reach. Using one is also outside the warranty.
How long does the G Pen Elite II battery last?
Grenco quote roughly 60 minutes of heating from the 2100 mAh cell, and a full charge over USB-C takes about 90 minutes. Sixty minutes is a heater-on figure rather than a number of sessions, and leaving the convection boost switched on brings it down.
Does the G Pen Elite II have an app?
Everything on it is set from the colour screen and the three buttons on the device — temperature, session timer, convection boost, haptics and brightness. The manufacturer documentation describes no app and no wireless features, and we removed an earlier claim on this page that it had Wi-Fi because we could not substantiate it.
How do you clean the G Pen Elite II?
Let it cool, then use isopropyl alcohol on a cotton bud around the screen, the silicone insert and the mouthpiece airflow hole. The insert and the spiral ceramic path both come out and can be soaked instead, then rinsed and dried. Run the device empty at maximum temperature once afterwards to drive off any alcohol left behind.
Sources
- Lanz C, Mattsson J, Soydaner U, Brenneisen R. Medicinal Cannabis: In Vitro Validation of Vaporizers for the Smoke-Free Inhalation of Cannabis. PLoS One. 2016;11(1):e0147286. accessed Sep 18, 2026
- Elite II FAQ. Grenco Science. Manufacturer specifications for battery, chamber capacity, dimensions and warranty. accessed Sep 18, 2026
- Meehan-Atrash J, Luo W, Strongin RM. Toxicant Formation in Dabbing: The Terpene Story. ACS Omega. 2017;2(9):6112-6117. accessed Sep 18, 2026
