"Danny D." wrote in message
...
Ian Field wrote, on Mon, 30 Nov 2015 21:40:17 +0000:

The official spec for USB says its limited to 500mA at 5V.

That's old information.
Here is newer information:
http://www.extremetech.com/computing...our-smartphone
How USB charging works, or how to avoid blowing up your smartphone

I guess it boils down to how badly you want to ruin peoples Christmas.

If the one you tried melted the USB cable and overheated the appliance,
something is clearly wrong.