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Skipweasel[_4_]

In article ,
says...
As a child, when non-rechargable batteries were all zinc-carbon,
I discovered you could get a bit more use out of them if you
warmed them up in the oven.

I found you could exract the carbon rods and use them with a car battery
to make nice hot arcs. Make a pool of salt and you could smell the
chlorine once it started to melt and electrolyse. Never managed to
isolate any sodium, though.

--
Skipweasel - never knowingly understood.