Can you measure the output?

I've never looked into the wiring of USB cables, but those connectors are so small that a standard multimeter wouldn't probably do you much good.

I wonder if there is a cable that you can plug into a multimeter? Or maybe an app for a phone that will tell you what the power source is inputing.

It did power the fan though, right? I'd have thought it'd power a few LEDs then with no sweat, so something must be amiss somewhere.

I'm looking forward to your video Franco. I hope you find something to power up soon!