I'm getting the 15.5 volt thing after reversing the polarity of the connector. I wanted to fast charge my Tx battery so I pulled the leads out of the connector so I can use alligator clips....forgot to mark them. D-OH! Anyway, this should be something that's user-serviceable...I bet it's something really easy to reset...

I'm going to pull my radio apart and see if there's anything that looks like a "reset" button........