Like most folk using Arduino-powered 3D printers, having installed Octoprint on a Raspberry Pi and connected it, I was faced with the irritating problem of the USB port powering the printer. This is one solution.
Yes, there area already a hundred solutions, some using sticky tape, but I never liked the wheel. I think it's a silly shape and I enjoy reinventing it.
So, I cut my USB cable, soldered in a DIL 4-way switch and printed up a little project box.
I can now switch off the positive supply rail to my printer's USB port.

Ender 5

No

No

200

30

A drop of superglue in each corner will hold the lid on nicely.

This solution has the advantage that if I'm using it to charge my phone at a public charging station, I can enable the power lines and switch off the data lines, so I don't have to be paranoid about someone gaining access to my phone.