If you didn't already know, you can power the Pi from the GPIO pins. By supplying pin 2 with 5v and connecting a ground to pin 6, you can power the Pi. My question; does it matter which pins are used? Could I use pin 4 for 5v and pin 14 for ground? (Really I'm just interested in if I can use a different ground pin.) Also, what is the max current that can be drawn when powered via GPIO, my Zero can draw up to 180mA, so I want to make sure that this is safe. Why or why not is this the case?
All my pin references came from the picture below.