How do you tell what type of USB ports you have?

To identify the specific USB ports and connectors on your devices, you can simply look at their shape and color, or check ...
Ars Technica

Are all micro-usb cables interchangeable?

I've got some old cords that have a micro-usb port on one end and a wall plug on the other. These are for charging mobile phones I used to have. Should I toss them or save them for future phones I'll ...