>While reading a article in Popular Science regarding US Navy AUVs >(autonomous underwater vehicles) I was astonished to learn that one of >them was powered by more then 9000 regular alkaline D cells! This is a joke, right ? At 5 seconds/battery it would take 12.5 man-hours to change them and a trip would cost $18000 (at $2/battery). Either that or Duracell is financing them. Or someone used Stephen King's Tommyknockers for inspiration and did not get the point about the power lines. Peter -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.