Re: dead battery

On 13 Jan 2008 14:15:23 -0500, Allan Adler <ara@xxxxxxxxxxxxxxxxxxxx>
wrote:

I have a dead AA Coppertop battery. I think there are things one can do
with the rod in a battery, e.g. carbon arcs, although I don't know how.
I won't ask about experimenting with the chemicals in the battery since
I've already directed that question to sci.chem.

If you want carbon arcs it is cheap and easy to use the graphite from
a lead pencil.

Or just go to an industrial supply store and pick up some electrodes
for a carbon arc torch - they are copper plated for a good connection
and about 3/8" in diameter and 8" long, not terribly expensive. The
copper is just a thin layer on the body not the pointed end - it burns
away easily.

It used to be possible to go to movie theaters and get the carbon rod
remnants from the projector lamps for free.

The battery chemistry is reasonably safe - just wash your hands and
don't eat the stuff.

I used to take apart the old #6 "telephone" batteries for the carbon
rods. They were about an inch in diameter and 6" long. They were
good for easily machined rocket nozzles, using just an electric drill
to shape the nozzle venturi.
--
.

Relevant Pages

  • dead battery
    ... I have a dead AA Coppertop battery. ... with the rod in a battery, e.g. carbon arcs, although I don't know how. ...
    (sci.electronics.misc)
  • Re: dead battery
    ... with the rod in a battery, e.g. carbon arcs, although I don't know how. ... Just remember to wear your welding helmet when you do - The arc may be ...
    (sci.electronics.misc)
  • Re: Replace keyboard for piano accordion
    ... hmmmmmmm i'm thinking if we put the battery force intermittently ... while monitoring the temp of the pivot rod we might be able ... just a plain piece of steel, and so to heat it we need to ... You *could* probably do it with a length of heavy gauge wire. ...
    (rec.music.makers.squeezebox)
  • Re: How to tell bad NiMH AA batteries
    ... Before you KILL yourself - I am NOT joking ... You CANNOT 'measure the amperage' of a battery. ... Buy a clamp-on current meter and a 0.5 inch diameter length of steel ... Put the meter around the rod, and drop this across the terminals ...
    (rec.photo.digital)
  • Re: dead battery
    ... with the rod in a battery, e.g. carbon arcs, although I don't know how. ... The times I've done it, it wasn't a particularly easy task, and I recall ... Duracell/Coppertops are) if you want to find a proper carbon rod. ...
    (sci.electronics.misc)