The seller had a few of these same radios, new in box, but all missing the chargers. My thought was either the seller sold them separately or the chargers were stolen and so whatever retail store had them could not sell them and they ended up on the street market. But after seeing that the OEM chargers are strictly 9v, they seem worthless without the radio. Unless it’s just a shitty label. Maybe the OEM charger is proper USB PD, but they only wrote 9v on the label. I can only speculate.

The universal charger I have could also be dodgy. It was from a 2nd-hand shop. But afaik it’s fine.

Since I don’t have the OEM charger, I cannot see how it is marked. I just recall it was only marked 9v.