What Is a Penjamin? The Discreet Vape Pens Explained

Learn what a penjamin is, how discreet vape pens work, types, battery life, safety, legality, and tips for choosing the right device for you.

  • Published September 22, 2026
  • Updated October 9, 2026
  • Reading time 10 min
What Is a Penjamin? The Discreet Vape Pens Explained
On this page 11 sections
  1. What Is a Penjamin?
  2. Why Is It Called a “Penjamin”?
  3. How Do Penjamin Vape Pens Work?
  4. 510 Threading Compatibility
  5. Battery Life and Charging
  6. Safety and Quality Considerations
  7. Types of Discreet Vape Pens
  8. Choosing the Right Discreet Vape Pen
  9. Are Discreet Vape Pens Legal?
  10. The Bottom Line
  11. Frequently Asked Questions

If you’ve spent some time online in the world of weed products, you might have encountered the term “penjamin” and thought that it was either a typo or just a slang term of the day. The truth is, however, that penjamin is a neat term used to refer to real-life products: vape pens designed to be disguised as writing pens. You can slip one into your shirt pocket or place it on your desk, and no one will be the wiser.

This article provides an explanation of what a penjamin is, where the term comes from, how such devices function, what types of penjamin there are, and safety and legal considerations you should take into account when buying one.

What Is a Penjamin?

A penjamin is an e-cigarette or vape pen that has been intentionally designed to look like a regular ballpoint pen or a stylus. Such devices are generally quite small — around 4-6 inches in size – and have modest designs in professional colors such as matte black, silver, or navy. Most even have a functioning clip at the end, which helps them look like real pens while also providing an easy way to carry the device without drawing undue attention.

Underneath the hood, the main difference between most penjamins and other vape pens does not lie in their internal structure but rather in their design that is meant to provide discreetness. The key design features are an extra-slim body, discreet colors, and no branding related to cannabis or marijuana.

All penjamins feature the common 510-thread mechanism, which means that any cartridge from cannabis oil cartridges available on the market will work in such a device. In other words, a penjamin is just a regular vape pen disguised as a regular pen.

Why Is It Called a “Penjamin”?

It is merely an example of wordplay in which the words “pen” and “Benjamin” have been used. In this regard, “Benjamin” refers to Benjamin Franklin, the founding father whose picture is featured on the $100 U.S. dollar bill. This pun has a double meaning because the devices in question look like common pens, while for their users, the possibility to ingest medication discreetly, not attracting attention, is worth its weight in gold – or in Benjamins.

Use of such slang by the community members is quite common when it comes to cannabis terminology. Just like words such as “dab” and “cart,” which have become a part of cannabis users’ everyday vocabulary, “penjamin” allows them to speak about these devices using casual language.

How Do Penjamin Vape Pens Work?

What Is a Penjamin? The Discreet Vape Pens Explained

In terms of function, penjamin is like any other 510-threaded vape pen. It is made up of a battery-operated heating element that heats the cannabis oil to the point where cannabinoids and terpenes become vapors without actually combusting the substance. Inhalation is done via the mouthpiece, where the user gets vapor instead of smoke.

Penjams employ the use of draw activation technology to automatically turn on the heating element upon inhalation instead of pressing a button. Not only does this simplify the vaping experience, but it also eliminates the clicking noise that button-activated vapes have in order to maintain the pen-like experience and eliminate any noise that may be distracting in a social setting. The heating elements of these devices usually operate within the 3.0 to 3.7-volt power range in order to produce a relatively smaller vapor cloud compared to the vapor clouds produced by vape mods.

The charging system of penjamins is made to be as discreet as possible. Penjamins usually feature hidden USB charging ports under a small cap, and some penjamins use magnetic charging systems to avoid exposing the user.

510 Threading Compatibility

The number “510” in the term 510-thread indicates that the size of the thread used in connection has 5mm in diameter and is capable of making one revolution within ten turns. As a result, the use of this thread has become an almost universal standard within the vaping community, which is positive news for penjamin users as it allows using almost all cartridges sold at legal dispensaries without compatibility problems.

However, not all cartridges are equally good choices for the device because the height of the cartridge is important in preserving the pen form; hence, a standard 0.5ml cartridge would maintain the pen form while a 1ml one would ruin it. In addition, it should be considered that oil type is crucial in choosing cartridges as well; full-spectrum and live resin cartridges have a strong odor and may destroy the purpose of the discreetness of the device.

Battery Life and Charging

Penjamin batteries are deliberately small for the purpose of maintaining the design of the pen, which implies that battery life tends to be limited, usually ranging from 280 to 400mAh. Practically, it amounts to about 100-200 puffs per charge, depending on the resistance of the cartridge and the duration of the hits.

A fully charged device normally takes 45-90 minutes. Typically, most pens have an LED light that is automatically switched off when the battery is fully charged to avoid unnecessary visibility during the process.

Safety and Quality Considerations

As penjamins are meant to be discreet, there is the temptation to purchase such items or the cartridges from unauthorized or unlicensed retailers. This is actually a danger that should be avoided at all costs. Cartridges that are bought from retailers who are not licensed do not meet the testing requirements, increasing the probability of obtaining a counterfeit cartridge, which might have toxic additives such as pesticides and other dangerous materials. It is important to know how to detect a fake cartridge by checking the lab-test QR code, ensuring that it is properly branded by the dispensary, and inspecting the oil’s color and consistency. This applies to the penjamin just like any other vaping device.

A good vaporizer should have the following essential features: short-circuit protection, automatic shut-off timer, and constant voltage regulation. If the device is heating up unevenly or has a burnt taste, or gets too hot when in use and being charged, then it has to be stopped immediately.

A few practical safety habits worth building in:

  • Buy devices and cartridges only from licensed dispensaries or verified, reputable retailers.
  • Store the device in a protective case to avoid accidental activation in a pocket or bag.
  • Clean the 510 connection point periodically with a cotton swab to maintain a solid electrical contact.
  • Avoid leaving the device in a hot car or in direct sunlight, since heat can damage the battery and degrade the oil.
  • Replace a cartridge if you notice any unusual change in taste, color, or oil consistency.

Types of Discreet Vape Pens

Pen-style devices generally fall into a few broad categories, each suited to slightly different needs.

Battery-Style (Rechargeable) Pens

This type of vaping device is reusable, featuring a rechargeable battery and a 510-thread disposable cartridge. Typically, it is the best value for money and offers the most convenience as it allows switching between cartridges without changing the whole device. The best devices feature draw activation, magnetic cartridges to allow for easy switching, and a discreet battery life indicator in the form of an LED. Some high-end devices also offer temperature control or a session timer, allowing users to personalize their experience even further.

Disposable Pen Vapes

Disposables, or penjamins, contain ready-to-use oil in the device and don’t require any setup, charging, or switching of the cartridge. It is a perfect choice for occasional vapers and people going on trips without extra equipment. However, the drawback of disposables is that when the oil in the device is used up, the device should be discarded.

Advanced Rechargeable Options

On the high-end side, there is some form of rechargeable penjamins with advanced features like accurate temperature regulation, monitoring usage, or even through a related smartphone application. Some penjamins utilize the module system whereby it is possible to swap out individual parts such as the battery and the heating element without changing the entire device.

Device TypeTypical Battery LifePrice RangeBest For
Basic Battery150–200 puffs$15–$30Daily users, budget-conscious
Premium Battery200–300 puffs$40–$80Heavy users, customization
Disposable200–300 puffs$25–$45Occasional use, travel

Choosing the Right Discreet Vape Pen

Your choice of the best pen will depend on how frequently you want to use it, where you are using it, and the amount of maintenance that you are able to handle. Someone who vapes frequently will be better served by an e-cigarette with rechargeable batteries and changeable cartridges.

A few practical features worth weighing before buying:

  • 510 compatibility – keeps you compatible with the widest range of cartridges from licensed dispensaries.
  • Draw activation – skips the audible click of button-based devices and feels more like using an actual pen.
  • Variable voltage – lets you adjust output depending on the cartridge you’re using.
  • Charging method – USB, magnetic, or other low-profile options each come with different trade-offs in convenience and discretion.
  • Size and weight – needs to strike a balance between battery capacity and staying genuinely pocket-friendly.

If you expect to use the device throughout the day, it’s worth doing a rough estimate of your daily puff count against the device’s rated battery life, so you’re not caught without charge halfway through the day.

The gadget itself is a battery-powered heating unit, and this is legal under state law anywhere, since it is nothing but an electronic device meant for vaporization purposes. The legality of the penjamins comes into question depending on the substances that you will use with it.

The cannabis cartridges are subject to the cannabis legislation in your particular state. If your state has legalized cannabis for recreational use, both the penjamins and the THC cartridges are available at the dispensaries licensed to sell such items. In the medical-only states, you need to have a prescription for cannabis to use it legally. It is important to note that cannabis is a federally controlled substance in the U.S., and thus transporting it across state borders – even from one state where it is legal to another – poses danger due to its federally controlled status.

It is also good to note that many of these gadgets can effectively operate with legal CBD oils and aromatherapy mixtures, which pose fewer restrictions compared to THC products. However, in case you are carrying such a device, it is always wise to check your local laws before thinking that you are okay, since it may come in handy.

Last but not least, it is always important to remember that many places ban vaping in public. Since penjamins are very discreet, it is always advisable to double-check the local restrictions regarding vaping irrespective of the cannabis laws.

The Bottom Line

A penjamin is essentially a well-known form of vaping equipment camouflaged intelligently, making it a product designed to go unnoticed among other things. For those people who need discretion, this feature may become crucial while using cannabis as their medicine in public places or during work. Just like any cannabis product, the most important point to have a safe experience with it lies not in the looks of the gadget but in purchasing both the pen and the cartridges only from licensed shops.

Frequently Asked Questions

What does penjamin mean in slang?

Penjamin refers to a vape pen that resembles an ordinary ballpoint pen. “Penjamin” is derived from “pen” and “Benjamin,” which is a reference to Benjamin Franklin and the $100 bill.

Is a penjamin the same as a dab pen?

No. Penjamin vapes consist of oil cartridges, while dab pens allow users to load cannabis concentrates by themselves.

How strong is a penjamin hit?

The hit strength depends on the cartridge and not the device, and the cartridges vary from low THC CBD oils to high THC distillates exceeding 80-90% cannabinoid levels.

Are penjamins good for beginners?

Yes, their draw-activated design makes them simple to use with no learning curve. Beginners should start with a low-potency cartridge and take small, spaced-out puffs.

Is using a penjamin safe?

It’s safe when you buy quality devices and authentic cartridges from licensed dispensaries. The main risk comes from counterfeit cartridges bought through unverified or unlicensed sellers.

Are penjamins legal to own?

The device itself is legal almost everywhere, since it’s simply a vaporizer. What you use it with – like a THC cartridge – is subject to your state’s specific cannabis laws.

This article is general information, not medical or legal advice. Cannabis laws change often, so check your state program’s official site before you act.

Share Facebook X LinkedIn
About the authorChristine WinterAMWA-Certified Medical/Scientific Writer

Christine Winter is an AMWA-Certified Medical/Scientific Writer (MWC) specializing in medical cannabis. She crafts evidence-based content on cannabinoids (THC, CBD) for pain, epilepsy, nausea, MS, and PTSD, including regulatory docs, patient guides, and CME.

All articles by Christine →

Ready to get your medical marijuana card?

Book a short online visit with a state-licensed provider. You only pay if you're approved.

Book Appointment Now →