After three calls to the Sony Helpline and two trips to a Sony shop, I finally got my NW-HD3 to work. I am now very happy with it and glad that I didn't go and swop it for an iPod (that was the next step!) Just wondering if anyone can tell me how the unit switches itself off? And after how long of not being used? I can't find anything obvious in the manual and don't want to be caught short with no battery when I need it most. Ta in advance.