It charges my Yaesu VX-8DR just fine. The Radio itself is designed funny. When I plug it in sometimes the radio turns off, and sometimes it stays on. Sometimes it lets me transmit and sometimes it just turns off. I'm not blaming this car adapter since my official Yaesu wall adapter does the same thing. The radio is one of the coolest handheld radios out there, but not being able to transmit while plugged in or charge it while using it is just strange. Every electronic device out there lets you use it and charge it at the same time. Oh well. At least this will charge it, just don't plan on using it until it is done charging. I've heard of other people having this same issue so I don't know if it is a defect in my radio or not since other reviewers say they can transmit while plugged in. I'm confused.