USB power supplies are super cheap and omnipresent. They are the Tribble of my household. But they’re not all created equal, and some of them may even be dangerous. I had to source USB power supplies ...

When the USB standard was first revealed, a few peripherals here and there adopted it but it was far from the “universal” standard implied by its name. It was slow, had limited ability to power ...

So I've tended to assume, possibly stupidly, that if a device relies on a USB power connection at all then any old AC->USB power adapter is fine to use for it and substitutable for a computer USB port ...