If the USB-PD PSU that you bought was correctly supplying 5V prior to any kind of negotiation, then how was it possible to damage the radio that’s expecting a 9V supply? Did they wire the polarity incorrectly?
It’s possible that it’s just the battery that needs replacing, and because it’s dead it doesn’t meet the minimum supply voltage to power the radio while it’s charging. You might want to try that before giving up on it.
If the USB-PD PSU that you bought was correctly supplying 5V prior to any kind of negotiation, then how was it possible to damage the radio that’s expecting a 9V supply? Did they wire the polarity incorrectly?
It’s possible that it’s just the battery that needs replacing, and because it’s dead it doesn’t meet the minimum supply voltage to power the radio while it’s charging. You might want to try that before giving up on it.