Custom 21700 PWM Mod

One-of-a-Kind White Powder-Coated Dual 21700 PWM Mod

I’ve had this unique white powder-coated enclosure stored away for years, waiting for the perfect moment to build it. Back in 2024, I began the process by engraving it—allowing the raw aluminum to shine through the design. That’s why you’ll see “2024” on the door engraving. After that, it sat untouched for another year until I finally came back to finish it—and the result was worth the wait. This piece turned out absolutely stunning, and it’s honestly hard not to keep it for myself.

This mod features a dual 21700 battery setup in series, delivering 8.4 volts through a PWM chip for maximum power output and fine-tuned control. It’s housed in a sleek B enclosure measuring 111mm x 60mm x 32mm, with a 32mm body thickness and an offset 22mm 510 connector, allowing for atomizers up to 32mm with zero overhang.

Inside, everything is cleanly wired and neatly organized, with all connections securely covered. It includes a convenient internal PWM adjustment dial for on-the-fly tuning.

For safety, we recommend using coils with a resistance of 0.28 ohms or higher. Please note that this is an unregulated MOSFET mod, designed for experienced vapers familiar with Ohm’s Law and safe building practices.