No idea but like you I will be hoping you get an answer.

1)take some old plastic can
2) of course do not forget the dung,.....add salt 1/5th of the cowdung. now add tamarind(very essential) about 1/4th.
now mix some water.....and put this mixture into the cans(plastic)
3)now take out the carbon rod from a old pencil battery and plug it in the mixture. and then put zinc or aluminium plate into the mixture.
simple....
for more see the other forum on the mechanism of the cow-dung battery.

Is there anyway to produce an waste to an electricity for inital use at home??