You can do USB-PD reception using no computers up to 5V3A. A simple resistor across two wires is enough. Also, circular connectors isn't the best thing. They t

You can do USB-PD reception using no computers up to 5V3A. A simple resistor across two wires is enough. Also, circular connectors isn't the best thing. They tend to use up more thickness for the same amount of power. I feel USB-C is a great compromise.