That's very strange. I've not seen that problem before, David. Doesn't it make you feel all warm and fuzzy that you're the only person on the planet with a given problem? It seems to happen to me a lot... It will be interesting to see if the problem is deterministic. If you repeat the sequence, PH on then off, will the lady stop talking to you? I've certainly had her telling me the battery voltage basically non-stop for a couple of hours, including while the bird was on the ground for a battery change. Mind you, I'm still back on Graupner firmware 1.003 (which I had to use as of May 2012 because the then current version wouldn't allow me to set SUMO 12). Andy.