A *simple* google search for "D-cell AUV Navy" revealed the following. http://www.popsci.com/popsci/science/article/0,12543,430240-5,00.html "Currently, small AUVs like Remus can operate for up to 22 hours and larger ones like Seahorse for up to 72 hours" "The Seahorse runs on 9,216 alkaline D cell batteries, the kind normally used in flashlights. For now that is the most efficient method, Head says, because D cells have higher energy density than currently available rechargeable batteries." http://pao.cnmoc.navy.mil/pao/n_online/archive/vol21no2/articles/seahorse.htm Powered by more than 9,000 D-cell batteries, the Seahorse can sustain four knots for up to 72 hours of operation. Then a search for "best power density battery table" http://www.hamar.fsnet.co.uk/teg/2/batteries.html Table listing Wh/kg http://www.buchmann.ca/article20-page1.asp Table listing $/kWH --- Marcelo Puhl wrote: > And what about size and weght? > > On 15 Mar 2003 at 7:46, Bob Ammerman wrote: > > > Not a joke. > > I expect the batteries are prepackaged into > modules to speed changeout time. > > ...and you really don't expect the military to be > too concerned about costs, > > do you. > > > > Bob Ammerman > > RAm Systems > > > > ----- Original Message ----- > > From: "Peter L. Peres" > > To: > > Sent: Saturday, March 15, 2003 4:27 AM > > Subject: Re: [EE]: Honda Insight Batteries > > > > > > > >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. > > > > > > > -- > > http://www.piclist.com hint: The PICList is > archived three different > > ways. See http://www.piclist.com/#archives for > details. > > -- > http://www.piclist.com hint: The PICList is archived > three different > ways. See http://www.piclist.com/#archives for details. __________________________________________________ Do you Yahoo!? Yahoo! Web Hosting - establish your business online http://webhosting.yahoo.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.