Wouldn't it be cool if every power socket was the same? Imagine if you could carry around a single cable and plug in any device to the wall. Share on Facebook (opens in a new window) Share on X (opens ...

I was looking at power boards in a hardware shop yesterday and noticed that a) many of them had USB sockets, and that b) the ratings for the USB sockets varied widely, from 1A to 3A. If I wanted to ...