This seems like a good idea, either the Kickstarter AAs* or DIY
All household items like paper and vinegar, except for the activated carbon cloth and Oxalic acid.
What he doesn't point out is the potential to stack these cells into a battery. The Amps are mentioned but not the cell voltage. T'would be nice to have a 5 Volt output source on the shelf for emergencies. To run my palmtop computer.
edit:
*Nevermind.
www.indiegogo.com/projects/jaw-batteries-what-every-prepper-needs#/
They reached 1% of their goal.