Batteries

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50+ year battery consisting of nickel and iron plates in an electrolyte of Potassium Hydroxide (similar to lye - which I'm guessing you could substitute).

Thomas Edison drove an electric car a hundred years ago. The batteries he used are easy to build and are still operational. Search for 'nickel iron battery', 'edison cell' or 'nife battery'. See http://www.beutilityfree.com/content/ I have a document on how to build one I need to dig up.

Lead acid

Lead acid cells are easy to make too. http://wiki.diyfaq.org.uk/index.php?title=Lead_acid_battery_construction NT 10:42, 19 March 2010 (UTC)

Nickel Iron Batteries

http://www.beutilityfree.com/content/index.php?option=com_content&view=article&id=44&Itemid=129