I think I've seen both eg the more typical 5 pin on most Cameras MP3 players etc and then the 4 pin that comes on the Pentax Optio S4 for example.

If you want the best performance, the rule is simple: Avoid USB-A. Don't buy a USB-A charging brick, and don't buy USB-A to USB-C cables for your high-power devices. Stick to a full USB-C ecosystem — ...