My Godox flash uses the PB-Cx power plug, same as Canon.
Im an electronics hobbyist and so no reason why I/we cannot build our own battery pack.
But I need some help, does anyone know what the pinout is for the plug?
Off the top of my head, Im thinking some 18650 batteries would make a bazinga power pack!
Once I see the pinout with voltages I can devise such a device.
Any success will be posted in this thread.