On 1 Aug 2008 14:00:46 GMT, Huge wrote:

On 2008-08-01, Pete Verdon d wrote:
wrote:

Oh, iron carbon batteries are he
http://www.wiki.diyfaq.org.uk/index....carbon_battery

Interesting, but curiously lacking in details of actually making the
thing. I assume one simply dips the carbon and steel electrodes in a pot
of salty water and obtains a voltage across them? How salty should the
water be?

Ahh, some googling leads me to find that these are more usually called "iron
air" batteries.

And here's how to make one;

http://www.miniscience.com/projects/airbattery/

Where do you get the magnesium electrodes?

Mg is probably banned by the guvmint in this country.

--
Frank Erskine