Actually they are working on the power density problem.

http://phys.org/news174139641.html

A battery with a "power density that is six orders of
magnitude higher than chemical batteries." That is six
orders not six times. "Kwon said that the battery could be
thinner than the thickness of human hair."

Nuclear batteries could provide the answer. Research is
impeded by fears that someone might use such a battery to
make a dirty bomb. Who knows, maybe someday they will work
it all out.

Allen

> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-
> bounces@mit.edu] On Behalf Of David C Brown
> Sent: Tuesday, October 22, 2013 11:06 AM
> To: Microcontroller discussion list - Public.
> Subject: Re: [OT] Thought experiment: Understanding volts
> vs amps
>=20
> The short answer to your question is :YES.
> BUT it would be a very large battery.
>=20
> The typical annual energy consumption for my home is
> about 9,000kWattHours
> or 9 ,000,000WattHours
> At 9 volts that is 1,000,000AmpereHours
> A typical car starter battery is 50 AmpereHours
> So your hypothetical battery would need to be 20,000 times
> larger than the
> car battery
> Since a car battery occupies about 0.5 cu foot you are
> looking at a battery
> of 10,000 cu feet.
> or a 22 foot cube.   Hope you have a big yard :-)
>=20
> Dave
>=20
>=20
> On 22 October 2013 13:21, Lindy Mayfield
> <Lindy.Mayfield@sas.com> wrote:
>=20
> > I've spent years, on and off, trying to understand what
> volts means and
> > what watts or amps or current means.  Literally since I
first
> opened a book
> > about electronics when I was small.
> >
> > I may perhaps be close.
> >
> > Given matter to energy conversion rules and laws, and
> adhering to all
> > known laws of physics...
> >
> > What if I had a 9 volt battery that could easily supply
all the
> power
> > necessary to my home for 1 year.  Or power a small
> neighborhood for a day
> > no matter what  the energy consumption...
> >
> > This would be indeed an efficient chemical battery, but
> given the right
> > technology, it could be done,  no?
> >
> > Given that:  Could I plug that same 9 volt battery into
> something small,
> > like a TV remote control, or a hand-held radio?  In
place of
> a 9v battery
> > that I can buy today?  Without any changes to resistors,
> capacitors,
> > transistors?  No changes to the circuits?
> >
> > And further, could that same 9 volt battery be used
> anywhere a battery is
> > required, a car starter, a toy, an electric wheel chair,
an
> electric train
> > normally powered by a diesel?  Assuming that in some
> cases the voltage will
> > need to be changed?
> >
> > It's probably painfully obvious those are my questions,
not
> any out of a
> > book or for a class.  :)
> >
> > Thanks!
> > Lindy
> >
> >
> > --
> > http://www.piclist.com/techref/piclist PIC/SX FAQ & list
> archive
> > View/change your membership options at
> > http://mailman.mit.edu/mailman/listinfo/piclist
> >
>=20
>=20
>=20
> --
> __________________________________________
> David C Brown
> 43 Bings Road
> Whaley Bridge
> High Peak                           Phone: 01663 733236
> Derbyshire                eMail: dcb.home@gmail.com
> SK23 7ND          web: www.bings-
> knowle.co.uk/dcb<http://www.jb.man.ac.uk/~dcb>
> --
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> archive
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