What is a USB-C Power Delivery Decoy and what is its use in ham radio?

I had posted about USC-C Power Delivery some time back and its potential use in ham radio. Legacy USB mode provides for up to 15 W power at 5 V and 3 A. SPR mode or Standard Power Range provides for up to 100 W with 20 V and 5 A, while Extended Power Range or EPR mode is capable of 240 W at 48 V and 5 A. But this requires a negotiation through configuration channel (CC) lines between the power source and the device. If the device which requires the power is not capable of this, like a ham radio, USB-C Power Delivery Decoy can be used between the power source and the device. USB-C PD decoy negotiates with the USB PD power supply to deliver a higher output. For example, an IC-705 portable amateur radio gives an output of 5W with the built-in power supply while it can deliver 10W with an external 12V or 13.6V battery.

It was VU2TUM during his roving trip in Alaska, who told me over X that he uses this method to power his IC-705 during portable operations. He has a 100W USB-C power bank which can give a 20V output. It is connected to USB-C PD 15V decoy. When this decoy is connected to IC-705 radio, it gives an output of 10W instead of the 5W with built-in internal battery. It is quite convenient as you do not have to go for additional 13.6V battery during portable operations. So this adds another use for USB-C Power Delivery, which I had not known at the time of my earlier post. After all, in ham radio, we do learn something new every day. That is the thrill of amateur radio! Decoy modules are available online, which can be used to give multiple selectable output voltages. They can also be used to test the functionality of power negotiation in USB-C PD chargers.