a Makita power tool battery. But the Fusion 360 design for the 3D printed parts got a lot of thought to make this one of the best fume extractor fans we’ve seen. There are a lot of details that ...

There’s even a TP4056 charge controller to top off the internal 18650 cell when the fume extractor is connected to a USB power source. Is it over-engineered? Perhaps. But projects like these are ...