SMYLE PENJAMINE 510 BATTERY WRITING PEN

The Smyle Penjamine is a 510-thread battery disguised as a functional ballpoint pen, built for vapers who need discretion in professional or public settings. It actually writes, so it sits in a shirt pocket or desk organizer without drawing attention. The kit includes everything you need: the pen device, charging cable, cart adapter for different cartridge sizes, and a user manual.

Why it works

• Genuinely blends in — looks and functions as a real writing pen, not a vape trying to look like one
• Universal 510 threading connects to standard oil cartridges you already own
• Included cart adapter handles different cartridge diameters for better compatibility
• Pocket-clip design keeps it secure and accessible without fumbling through bags
• Compact enough for daily carry without adding bulk to your routine

Best for

This is built for people who vape during the workday or in situations where pulling out an obvious battery isn't ideal. Office workers, travelers, anyone who doesn't want to explain their device to curious coworkers or family members. If you're comfortable with a standard exposed battery, this probably isn't worth the premium — but if discretion matters, it's one of the more convincing stealth options out there.

How to use it

Unscrew the pen tip to reveal the 510 connection. Thread your cartridge onto the battery — if it's a narrower cartridge, use the included adapter for a snug fit. The pen cap covers the cartridge when not in use, completing the disguise. Most 510 batteries in this form factor are draw-activated, meaning you just inhale to fire. No buttons to accidentally press in your pocket.

When someone hands you paper to sign, the other end actually writes. It's not going to replace your favorite pen, but it's functional enough to maintain the cover. Charge via the included cable when the battery runs low — you'll notice weaker vapor production when it's time to top up.

For cartridge recommendations and compatibility, check out resources from Leafly's vaporizer guide to understand what works best with 510-thread batteries.

Specifications

What's included

• 1x Penjamine pen battery
• 1x USB charging cable
• 1x Cart adapter
• 1x User manual

Limitations

Like most pen-style batteries, this isn't a powerhouse. It's designed for low-wattage oil cartridges, not high-resistance or thick distillate carts that need more heat. If you're used to variable voltage batteries with multiple settings, the fixed output here might feel limiting. The tradeoff is simplicity and stealth — it does one thing well.

The writing function is real but basic. Don't expect gel-pen smoothness. It's there to complete the disguise, not win any handwriting awards.

Frequently asked questions

Will this work with any 510 cartridge?

It works with standard 510-thread cartridges, which covers most oil carts on the market. The included adapter helps with narrower cartridges that might otherwise wobble. Very thick or high-resistance carts might not perform as well since pen batteries typically have lower power output.

Does the pen actually write?

Yes, it's a functional ballpoint pen. The writing end works independently from the vape end. Ink quality is basic — it'll sign documents and take notes, but it's not going to be your go-to for journaling.

How do I charge it?

Use the included USB cable. Unscrew the appropriate end (check your manual) to access the charging port. Most pen batteries fully charge in 1-2 hours. The light indicator shows when it's done.

How long does the battery last?

Depends on your usage, but expect a day or two of moderate use before needing a charge. These compact batteries prioritize portability over capacity. Keep the charger at your desk if you're a frequent user.

Is it really that discreet?

From a glance, it looks like a pen. Close inspection might reveal the cartridge housing, but with the cap on, it passes in most settings. The pocket clip helps it look like standard office supplies. Won't fool someone actively looking for a vape, but it handles casual observation well.

Can I adjust the voltage or temperature?

No, this is a fixed-output battery. The simplicity is part of the design — no buttons to accidentally trigger, no settings to fiddle with. If you need variable voltage, check out vape accessories with more control options.

What's the cart adapter for?

Cartridges come in different diameters. The adapter creates a tighter fit for narrower carts so they don't wobble or lose connection. If your cartridge fits snugly without it, you don't need to use it.