Jens and others,
My Bat 60 is showing a error message in the battery manager about one of the cells. The voltage seems fine. The capacity is lower than normal (not sure I can trust the capacity numbers, as I have not use the transmitter much).
I'm getting the exclamation character in the display, and error sound, and the on/off button colors are blinking red, so the transmitter is signaling something is wrong. I just got this in December (direct from Germany), so its somewhat disappointing if a cell has already gone wrong.