On Fri, 3 Jul 2009 10:35:57 -0400, "Ed" wrote:


wrote in message
.. .
On Thu, 2 Jul 2009 20:55:58 -0400, "Stormin Mormon"
wrote:

Nicad and nickel metal are 1.2 volts per cell. For those,
you'd need 100 to make 120 volts.

Well, goody, goody for you. There are also cells that are 2.2 volts
per cell. I didn't specify any particular technology. Just that no
existing technology would allow for a "very, very, small" 120 volt
battery to power a drill.

If you choose cells that produce 1.2 volts each, then you will also
end up with something bigger than "very, very, small".


IIRC, back when the first RCA portable radios hit the market in the 1950's,
they had a 90V battery in them. I'm sure it is possible to make a 120V
battery, but may not be practical.


I have a Motorola portable radio here with just such a battery (long
dead of course) Like modern batteries, it is actually a lot of small
cells connected together to get the higher voltage. Its physuically
about the4 size of 8 C cells, but of course it has many more cells
than that. The radio has a second battery to power everything else.
The 90 Volt is just to heat the tubes.