Review Summary
The Penjamin 510 battery takes incognito to a whole other level. This cart vaporizer is disguised as a real (actually writing!) pen. The cart is completely concealed in the body and the top of the pen is used as the mouthpiece. This means that it’s practically impossible to tell what’s inside, unless you have x-ray vision. It works with 0.5gr or 1gr carts, and has three voltage levels. The Penjamin battery is stealth vaping at its best and is more than just a novelty—it’s a solid vape device. At $34, it’s an affordable and innovative option for users looking for a 510 battery disguised as a pen that blends into everyday life.
- • #1 on Disguised Batteries
Pricing Info ⓘ
Comparison
Penjamin 510 Battery
|
Car Key 510 Battery
|
Cartisan EVO 510 Battery
|
Ccell Fino
|
Ccell M3B Plus
|
|
|---|---|---|---|---|---|
| Score (1-5) |
4.5 Current Review |
4.3 |
4.8 |
4.6 |
4.4 |
| Brand | Smyle Labs | Smyle | Cartisan | Ccell | Ccell |
| Retail Price |
$34.00 |
$35.00 |
$45.00 |
$48.00 |
$35.00 |
| Release Date | February 2023 | ||||
| Compatible With | 510 Carts | 510 Carts | Concentrates, 510 Carts | 510 Carts | 510 Carts |
| Body Material | Plastic | Plastic | Plastic | Metal | |
| Mouthpiece Material | Plastic | Plastic | |||
| Heat Up Time | 10 Seconds | 10 Seconds | 5 Seconds | 10 Seconds | 5 Seconds |
| Precise Temp Control | ✗ | ✗ | ✗ | ||
| Temperature Range | 3 Levels | 3 Levels | 6 Levels | 8 Levels | 3 Levels |
| 510 Thread | ✓ | ✓ | ✓ | ✓ | ✓ |
| Coil Type | Quartz Rods | ||||
| Glass Compatible | ✗ | ✗ | |||
| Battery Type | Internal | Internal | Fully-Concealed | Fully-Concealed | Vape Pen |
| Battery Capacity | 1000mAh | 1190mAh | 900mAh | ||
| Sessions Per Charge | 9-12 | 9-12 | 9-12 | 12-15 | |
| Charge Time | 1-2 Hours | 1-2 Hours | 1-2 Hours | ||
| Charger Type | Micro-USB | USB-C | USB-C | USB-C | |
| Passthrough Charging | ✓ | ✓ | |||
| Display Type | LED | LED | LED Indicators | LCD | |
| Smartphone App | ✗ | ||||
| Firmware Updates | ✗ | ||||
| Session Mode | ✗ | ✓ | ✓ | ✓ | |
| Adjustable Airflow | ✗ | ✗ | ✗ | ||
| Warranty | 30 Days | 30 Days | 90 Days | 90 Days |
Background
Smyle Labs, the brand behind the Penjamin Cart Pen, specializes in sleek and discreet vape batteries (such as the Key Fob and the Permanent Marker). Their focus on innovation and functionality makes them a standout in the 510 battery market.
The Penjamin is designed for ultimate stealth, making it a great choice for users who need a low-profile vaping experience. For more top-rated options, check out our list of the best 510 batteries of 2025.
The Penjamin writing pen retails for $35 from VGEAR and coupon code VG10 will save you 10% on all devices.
Design & Build Quality
The Smyle Penjamin looks and feels like a high-quality ballpoint pen, making it one of the best 510 battery writing pens available. It’s lightweight but sturdy, with a twistable bottom for writing and a hidden compartment for your cartridge. The top cap conceals your cart, allowing for total discretion.
One thing I really like about this pen is that can you remove the top cap and inhale directly from the cart instead of indirectly (through the mouhtpice).
Features
- Ultra-Discreet Pen Design – Functions as both a real writing pen and a 510-threaded battery.
- Adjustable Voltage Settings – Three temperature levels allow customization of vapor intensity.
- Preheat Mode – Two clicks activate a preheat cycle for smoother hits.
- 510 Compatibility – Works with most standard 0.5g and 1g carts.
- Micro-USB Charging – Rechargeable battery with included cable.
- Cap Concealment – The top cap hides your cartridge when not in use.
How to Use the Smyle Penjamin Cart Pen
- To Write: Twist the bottom of the pen counterclockwise to extend the writing tip.
- To Vape: Remove the top cap to expose the cartridge chamber.
- Insert Cartridge: Screw in any standard 510-threaded cart.
- Power On/Off: Click the button five times to turn the device on/off.
- Preheat Mode: Click the button two times to activate a preheat cycle.
- Adjust Voltage: Click the button three times to cycle through the voltage settings.
Compatibility
The Penjamin is compatible with 510-threaded cartridges, supporting both 0.5g and 1g carts. Its design has a snug fit, but larger or oddly shaped carts may not fit inside the cap when concealed.
Performance & Battery Life
For a compact battery, the Penjamin delivers surprisingly strong hits. The adjustable voltage ensures versatility, and the preheat function is useful for thick oils.
The battery life lasts a full day of moderate use, but unfortuanly the charger included in the kit is an outdated micro-USB instead of a USB-C- and this, in my opinion, is thebiggest con of this battery- it's outdated charger.
Compared to similar 510 battery writing pens, the Penjamin stands out for its stealth and ease of use.
Final Verdict
If you need a 510 battery disguised as a pen, the Smyle Penjamin Cart Pen is a top-tier choice. It’s perfect for on-the-go vaping, providing stealth, reliability, and good vapor production. At $34, it’s an affordable, well-designed device that seamlessly blends into everyday life.