A:Answer Looks like Galaxy 9 has C port. The cable I Have Is a standard USB to C cable. As long as you are coming from a 5V USB port from your charging device you should be OK.
If your charge source has C port you need a cable that has size C on BOTH sides. My cable, as referred to in this question, is a USB-A to USB-C. Some AC chargers are now C ports, So you need C to C cable. Hope this helps!