The G Pen Dash from Grenco Science weighs 62 g and fits in your palm like a thick pen. It's one of the cheapest branded dry herb vaporizers available, making it a tempting entry point for budget-conscious first-timers.
That rock-bottom price comes with real trade-offs. We scored the Dash well below the portables we recommend on our portable vaporizer rankings, with vapor quality and build durability dragging the overall down. For roughly twice the asking price, the XMax V3 Pro7.5 delivers a fundamentally better experience.
The Dash does have a loyal following among casual users who value pocketability above everything else. We tested it across all 3 temperature presets over multiple sessions to map where it earns its keep and where it falls short.
What's in the Box
Grenco Science keeps the package bare-bones. You get the G Pen Dash vaporizer, a stainless steel packing tool with keychain attachment, and a Micro-USB charging cable.
No spare screens, no carrying case, no dosing capsules. If you need accessories, you're sourcing them separately.
A pen-sized metal body at 62 g
The Dash measures 127 mm tall and 22 mm wide, roughly the size of a thick marker. The stainless steel body adds just enough weight to feel tangible in hand, but 62 g keeps it among the lightest portables we've tested.
The magnetic mouthpiece snaps on and off cleanly. It's made from plastic, which keeps weight down but won't survive drops the way a metal or glass mouthpiece would. It disassembles into several small pieces for thorough cleaning, a genuine design advantage.
The glass-glazed stainless steel oven sits recessed inside the body with a funnel-shaped opening that prevents spillage during loading. It holds approximately 0.25 g of ground cannabis. Multiple users note the exterior gets warm near the oven during extended sessions, especially at the highest temperature. The 1-year warranty is also shorter than what most competitors in this price range offer.
Whether you own the G Pen Dash or are still deciding — your thoughts and questions are welcome here.
Reviewed by
The VapeExperts Editorial Team
Every vaporizer we cover is bought, lived with, and tested by the same small team. We log temperatures with an external thermocouple, run battery cycles to depletion, and spend at least two weeks on a device before we score it. No manufacturer has ever paid for, previewed, or influenced a review on this site.
Conduction heating across 3 fixed temperature presets
The G Pen Dash uses pure conduction heating, where the oven walls directly contact your cannabis to produce vapor. It reaches temperature in approximately 30 seconds and vibrates to signal it's ready.
You get 3 temperature presets: 190°C (Low), 205°C (Medium), and 220°C (High). No degree-by-degree adjustment, no app control. Our temperature guide explains how even these small differences between presets change flavor and effects.
At the medium 205°C setting, vapor production picks up noticeably. Most users settle here for a workable balance between flavor and visible clouds. The vapor path runs through stainless steel before reaching the plastic mouthpiece, which provides minimal cooling and doesn't help preserve delicate terpenes.
As a session vaporizer, the Dash runs on a 5-minute auto-shutoff timer per cycle. Users report 6-8 draws per cycle, with many running 2-3 consecutive cycles at increasing temperatures to extract the full range of cannabinoids from a single load. The draw resistance is tight, requiring slow, deliberate inhales to pull vapor effectively.
Vapor quality is the Dash's clearest weakness. Conduction-only heating produces thinner, less flavorful vapor compared to convection or hybrid heating alternatives in this price range. The narrow 30°C span between the lowest and highest presets also limits fine-tuning. Experienced users stepping down from better portables will feel the gap right away. Our convection vs conduction guide explains why this difference matters for flavor.
One upside: the leftover AVB (already vaped bud) comes out evenly browned on the lower settings, so you can repurpose it in edibles for extra value from each load.
950 mAh lasts roughly 6 sessions per charge
The Dash packs a 950 mAh non-replaceable battery. Grenco Science rates it at approximately 6 sessions per charge, and real-world reports confirm this. Heavier users who cycle multiple times per load see 3-4 total uses before reaching for the charger.
Charging takes about 120 minutes via Micro-USB. In 2026, the lack of USB-C is a real inconvenience when the rest of your gear has almost certainly moved on.
Three LED lights show battery level, but some users find them misleading. One lit LED means dead, not one-third charged. Learn this before you get caught mid-session with no warning.
The non-replaceable battery is the biggest long-term concern. Multiple owners report noticeable degradation within 2-4 months of daily use. One retailer reviewer noted purchasing "several units" because the battery "only lasts about two to four months." Occasional users will get more life, but daily sessions push this vaporizer toward an early end.
One button controls everything
The Dash earns its highest marks for simplicity. Hold the button for 3 seconds to power on, click to cycle through temperature presets, and let the auto-shutoff handle the rest. Haptic vibration signals when it reaches temperature. No screen, no menus, no confusion.
Loading the funnel-shaped oven takes seconds. Grind your cannabis finely, drop it in, and pack gently with the included tool. Our grinding guide covers the best consistency for conduction vaporizers. Users who pack too tightly report restricted airflow, while loose loads heat unevenly.
Cleaning is consistently praised by owners. The magnetic mouthpiece disassembles fully for soaking in isopropyl alcohol every 5-7 days. Brush the oven out while it's still warm after each session for best results.
The learning curve is minimal for new vapers. That said, session consistency varies more than you'd expect. One forum user noted a "wide variation in efficiency" depending on strain, grind, and cannabis moisture content. Experimentation is part of the process with this vaporizer.
How It Compares
The G Pen Dash sits at the very bottom of the portable vaporizer market. Here's how it measures up against the two alternatives buyers cross-shop most.
G Pen Dash vs XMax V3 Pro
The XMax V3 Pro costs roughly twice the asking price but delivers a fundamentally different vaping experience. It uses convection heating instead of conduction, producing cleaner, more flavorful vapor. It also offers degree-by-degree temperature control, a replaceable 18650 battery, and USB-C charging.
The Dash wins on pure portability at 62 g versus the V3 Pro's larger frame, and it costs less up front. But the V3 Pro's replaceable battery means it won't become disposable in a few months, and the vapor quality gap is wide. For most buyers, the step up pays for itself many times over.
G Pen Dash vs PAX Mini 2
The PAX Mini 27.8 targets the same pocket-size audience at 89 g, 27 g heavier than the Dash. It heats up in 22 seconds (8 seconds faster), delivers better vapor from its conduction oven, and comes with a more polished build and stronger brand support.
The Dash costs less, and that's its single advantage here. The PAX Mini 2 sits in a higher price bracket but earns the gap with better vapor quality, a sturdier chassis, and a more refined overall experience.
Who Should Buy the G Pen Dash
The G Pen Dash suits a narrow slice of the market where minimum cost and maximum portability outweigh vapor quality.
First-time vapers on the absolute tightest budget who want to test whether dry herb vaping works for them before spending more. The Dash gets you started, even if you'll outgrow it fast. Our beginner's guide can help you decide if stepping up makes more sense from day one.
Pocketability-first users who need a 62 g vaporizer that disappears into any pocket and draws zero attention at concerts, events, or while traveling.
Occasional, light users who vape once or twice a week and won't stress the battery or build quality the way daily sessions do.
Final Verdict
The G Pen Dash heats cannabis and produces vapor at the lowest price in the category. That's its pitch, and it delivers on it. But in a market where spending a bit more unlocks far better vapor quality, battery longevity, and build materials, VapeExperts can't recommend the Dash to most buyers as of May 2026.
Grenco Science has since released the G Pen Dash II6.2 at the same $49.95 price with an OLED display, precise temperature control, a larger 0.4 g chamber, and USB-C charging. The original Dash has been discontinued. Buyers considering Grenco's budget line should start with the Dash II instead.
