Smyle Labs

Smyle Labs Pen: The Cart Battery With an Alter Ego

Smyle Labs built much of its identity around one very simple idea: a cartridge battery does not have to advertise what it is.

The original Penjamin Cart Pen demonstrated the idea perfectly. It looks like a conventional writing pen, clips into a pocket like one and—importantly—actually writes like one. Inside the upper section, however, sits a rechargeable 510-thread cartridge battery.

That combination turned Penjamin into more than a funny product name. It created an entire design language around functional disguise.

Why Are Penjamin Cart Batteries So Popular?

First, they're memorable.

There are approximately eleven billion rectangular 510 batteries competing for attention online. A battery that is also a writing pen has a significantly easier elevator pitch.

Second, many Smyle products are designed around concealing or protecting the cartridge rather than leaving an exposed glass cart sticking out of the top. For people who regularly carry cartridges, that can be useful even if you are completely immune to the comedy.

Third, the designs appeal to several audiences simultaneously: cartridge users looking for privacy, collectors who enjoy novelty hardware, gift shoppers searching for something unusual, and people who simply have enough standard vape pens already.

From Penjamin to an Entire Extended Family

Once the original writing-pen concept worked, restraint was apparently removed from the product-development checklist.

Smyle Labs now has cartridge batteries shaped like permanent markers, inhalers, lip balm tubes, purses and sci-fi props. There are Danksabers, Wandjamins, Ray Guns, Mini Plugs, Pursejamins and even a Robotjamin.

In other words, Penjamin stopped being a product and became a genre.

Smyle Labs Pens: Yes, They Actually Write

The most important products for the Smyle Labs Pens search are also the simplest to explain: they are writing instruments with a second career as 510 batteries.

Original Smyle Labs Penjamin Cart Pen

The Smyle Labs Penjamin 510 Thread Cart Vape Pen Battery is still the essential starting point.

It works as an actual ink pen, while the upper body houses a compatible 510 cartridge. Smyle designed it for common 0.5g and 1g cartridges, with three adjustable power settings and a preheat mode.

Five clicks power the battery on or off, two clicks activate preheat, and three clicks cycle through the available temperature settings.

This is the rare occasion where asking somebody, "Can I borrow your pen?" may require a slightly more specific follow-up question.

Permanent Marker Penjamin

The Smyle Labs Permanent Marker Penjamin follows the same philosophy but goes significantly bigger.

It is designed to resemble—and function as—a permanent marker while hiding a 510 cartridge inside the body.

The marker format gives Smyle more internal space than a traditional writing pen, allowing it to accommodate much larger cartridges. Current Smyle specifications advertise support for carts up to 4g+, along with an extra-tall cap option.

It also offers three voltage levels: 2.7V, 3.1V and 3.6V, plus a preheat function.

The original Penjamin says, "Nothing to see here, just taking notes." The Marker says, "Nothing to see here, just labeling a moving box with suspiciously adjustable voltage."

Penjamin Cart Pen Batteries: The Disguise Department Got a Budget Increase

The Penjamin concept gets even more interesting once Smyle stops pretending the battery needs to be a writing instrument.

Two of the smartest examples are the Smyle Labs Inhaler and Lip Balm Cart Battery.

Smyle Labs Inhaler 510 Cart Battery

The Smyle Labs Inhaler 510 Thread Vape Cart Battery is one of the brand's most elaborate concealed designs.

The cartridge fits inside an inhaler-style body rather than sitting exposed above the device. Underneath the disguise is a 400mAh rechargeable battery with four voltage settings: 2.2V, 2.7V, 3.1V and 3.6V, plus preheat and USB-C charging.

Smyle also incorporates a replaceable cloud-filter system intended to reduce some visible vapor during exhale.

This may be the first vape battery where remembering to replace your filter makes you sound like you are discussing either an automobile or home HVAC maintenance.

Smyle Labs Lip Balm 510 Cart Battery

The Smyle Labs Lip Balm Discreet 510 Cart Battery goes in the opposite direction: simple electronics, extremely clever packaging.

It resembles a lip balm tube and uses a button-free 3.3V battery with USB-C charging. The kit also includes a second matching lip balm-style container for storing a compatible cartridge when it is not installed on the battery.

Most 510 battery kits give you a charging cable. Smyle Labs looked at that and decided what you really needed was a second fake lip balm.

They may have a point.

Mini Plug: Less Disguise, More Technology

The Smyle Labs Mini Plug proves the company can make an interesting battery without dressing it up as stationery.

This pocket-size 510 battery features a 450mAh battery, 1.5V–4.2V adjustment, color display and built-in USB-C charging connector.

Instead of hunting down a cable, the built-in connector can plug directly into a compatible USB-C device or charger. It is essentially the Penjamin philosophy distilled to: "What if we hide the charging cable instead?"

More Smyle Labs Products: Apparently the Pen Was Only the Beginning

Smyle Labs has expanded considerably beyond the original Penjamin. VapeBatt's current collection includes several 510 batteries that lean much harder into novelty design.

Danksaber & Wandjamin

The Smyle Labs Danksaber takes inspiration from a certain famous glowing sci-fi sword without forcing your cartridge battery to remain on the boring side of the Force.

It supports common 510 cartridges, offers three voltage settings and preheat, and lights up while firing.

The Smyle Labs Wandjamin approaches the same problem from the magical side of the bookstore.

Ray Gun & Robotjamin

The Smyle Labs Ray Gun turns a 510 battery into a retro sci-fi prop, because apparently vaporizing oil was not futuristic enough already.

And then there is the Robotjamin .

Robotjamin combines 510 cartridge compatibility with a remote-controlled robot platform. Smyle's current limited-edition version even incorporates two-way walkie-talkie communication.

At this stage, calling it simply a "vape battery" feels disrespectful to how unnecessarily complicated—and therefore wonderful—the situation has become.

Pursejamin & Chugjamin

The Pursejamin turns the battery into a miniature fashion-accessory-style purse with cartridge storage and a keychain-friendly format.

The Chugjamin moves the novelty in an entirely different direction.

Because once your product catalog contains pens, markers, lip balm, lightsabers, purses and robots, asking "Is that really necessary?" has clearly stopped being productive.

Smyle Labs Accessories

Smyle also makes products outside the Penjamin battery family. VapeBatt's current assortment includes the Fyre Saber Torch Lighter, Gas Pump Torch Lighter and Downstem Soaker Glass Cleaner.

So yes, even the accessories department appears to have been instructed not to make anything too normal.

Penjamin FAQ: 10 Questions People Ask Before Their Pen Starts Vaping

These questions cover the biggest practical searches around Penjamin Cart Pens, Smyle Labs batteries and concealed 510 cartridge devices: operation, cart compatibility, voltage, preheat, charging and maintenance.