It's a pen battery - that's also a real pen! Embrace the fusion of discretion and functionality with the Penjamin 510 Battery by Smyle® Labs.

With its patented design that mirrors a traditional pen, this cartridge writing penjamin takes your experience to new heights of convenience. Made with high-quality materials and built to last.

All parts must be clean for valid warranty!
ALL Warranty is done through manufacturer. Make sure to keep original receipt.