Comment on USB-C PSU is 9v *only*. Is that compliant? Did a PD-compliant charger fry my gear?
eleijeep@piefed.social 2 days ago
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.
evenwicht@lemmy.sdf.org 2 days ago
Dead battery was my 1st theory, but it’s questionable. I fiddled with a healthy demo unit (same model) at the store. The battery ran out of juice and the machine shut down. I plugged it in and hit the power button and it instantly turned on. So it can apparently run directly off the USB-C as the battery charges (and the manual says as much). But the one I have never powers on, even when connected to power.
Fluke@feddit.uk 2 days ago
There’s a wide voltage difference between “I’m dead, charge me” and “I’m so dead any half competent charging circuitry will refuse to charge me lest I combust”.
If it’s fuggered, you’ve got nothing to lose by opening it up and seeing how hard replacing the (probably 18650 Li-Ion) cell(s).
Good chance they’ve got solder tabs spot welded onto the cells, but that’s not a showstopper, you can buy em that way if you don’t know anyone with a spot welder.