I've got 2 small "Anker Nano" phone chargers, with US 2 pin plugs 100~240V input and high power USB-C output. These get good reviews & are ideal for travelling in Asia.
Unfortunately, my toothbrush and one other device have USB-A connectors on the bespoke charging cables.
So I tested one device with a USB-C male to USB-A female connector, so I could use the device & normal cable on the USB-C charger.
This did not work. Eventually I established that the cable wasn't working.
What I don't know is if the cable had already failed, or if I've managed to configure a non-approved USB combination & overload the charging cable.
I believe USB-C cables are supposed to contain a chip to tell the charger how much current they can handle.
However, in the absence of that I would have expected a very low default current. Perhaps not low enough ?
![Rolling Eyes :roll:](./images/smilies/icon_rolleyes.gif)