​I wanted to find a practical way to make the FS-S1 ultrasonic knife cordless. My goal was to design a case as small and compact as possible, so it still feels comfortable and ergonomic in your hand. I alsomade sure the internal wiring and BMS integration are clean, safe, and straightforward. The tool itself is often on sale for €50–70, while factory cordless alternatives usually start at €120–150. I created this mod to solve my own problem and hope it’s useful for others too. Happy building!

War nichts im Umlauf, da musste ich ran ans Modelieren.