PuffBank: The DIY 3D-Printed Powerbank for E-Cig

PuffBank is a compact, stylish, and fully 3D-printable powerbank designed to keep your e-cig charged and ready—wherever you are.

Created with everyday use in mind, this project blends practical functionality with customizable design, making full use of Additive Manufacturing and the possibilities of Industry 4.0. Whether you're into DIY gadgets or just need a reliable e-cig charger, PuffBank is here to power your day—with flair.

This powerbank is compatible with e-cigarettes with a 17 mm maximum diameter.

✨ Why PuffBank?

• Fully customizable design (colors, logos, finishes)
• Compact and efficient, perfect for everyday carry
• Smart design optimized for FDM 3D printing
• PD-compatible USB-C charging
• Designed for real-world use, not just as a concept

🔧 Components

• 🧱 3D-printed body
• 🔋 Samsung INR18650-35E battery – 3500 mAh
  • Aliexpress Link
• 🧠 PCB module (FM5324G) with:
  • USB-C charging input
  • Power Delivery support
  • Integrated 5V / 2A step-up converter
  • Aliexpress Link
• 🔌 USB-A male connector (plugs directly into your e-cig)
  • Aliexpress Link
• 🔄 Rotating base assembly (2 parts):
  • Base with USB-C male connector
  • Locking ring that snaps into the powerbank’s body
• ⛓️ Bottom cap with built-in LED light-blocking shield
• 🖼️ 2x side logo inserts, designed to snap-fit into the powerbank’s body

🛠️ Recommended material

For the best look and feel, we strongly recommend using Bambulab Matte PLA. It delivers a clean, modern finish that gives PuffBank a premium aesthetic straight off the print bed—no post-processing needed.

🧩 Assembly Guide

1. Print the parts

   All parts are optimized for FDM printing. Recommended settings: 0.2 mm layer height, 15–20% infill. Use supports only where needed.

2. Add the side logos

   Push the two round logo badges into the dedicated side slots and secure them with epoxy glue for a flawless finish.

3. Assemble the rotating base

   Glue the base and the locking ring together using a two-part epoxy adhesive. This mechanism allows the USB-C connector to stay firmly in place while rotating into position.

4. Insert and glue the USB-C male connector

   Solder two wires into the connector, plug it into the rotating base and secure it with epoxy glue for long-term durability.

5. Assemble and Slide in the electronics

   Solder the battery to the PCB module and the USB-C male connector wires. The internal rails inside the body are designed to hold the board tightly. If insertion is difficult, you can lightly sand the rails to reduce friction.

6. Close with the bottom cap

   The cap includes an integrated LED mask to prevent internal light bleed, keeping your PuffBank looking clean and sharp even when powered.

⚡ Charge with confidence

PuffBank is USB-C powered and supports Power Delivery, making it compatible with most modern fast chargers. It's ready for quick top-ups wherever you go—no special cables needed. Use a high-quality 18650 Li-Ion cell (Samsung 35E recommended). The PCB module handles charging and power output seamlessly.

🧠 Print it, Use it, Make it yours.

PuffBank isn’t just another case or a random 3D print—it’s a fully functional accessory, tested through many iterations and built for real-world use.

Every detail has been refined, every measurement verified. Now it’s your turn to bring it to life.

💥 Support the project!

If you liked this design, found it useful, or just want to support indie makers pushing the boundaries of 3D printing, don’t forget to:

✅ Like the project
🚀 Boost it on Maker World
💬 Leave a comment or suggestion!

🛒 Don't want to print it out and assemble it yourself? Support me obtaining it on my Etsy shop!

Your support means a lot and helps fuel the next round of ideas and improvements. This project took a lot of testing, trial and error, and now it’s finally ready to be shared with the community.