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It's possible to make a battery using cat food! To do this, open the tin preferably without the cat being near otherwise it'll expect to be fed. Put a fork into the middle of the food so the fork stands up and doesn't touch the can. Now there is a voltage between the fork and the tin can. This is because the fork and the can are made of different metals and the cat food becomes an electrolyte and conducts electricity to some extent. The amount of electricity generated by a catfood battery is not great and won't light a bulb, but it is measurable and will drive "solar" motors.
The original burrito battery. You'll need some activated charcoal too.http://www.exo.net/~pauld/activities/AlAirBattery/alairbattery.html
... what I am trying to do is make a battery at the lowest possible cost.
From 2001 until 2008, the price of the metal has increased by more than 500 percent.
biogas (methane) from animals' excrement
Quote from: Geezer on 27/06/2011 23:19:42The original burrito battery. You'll need some activated charcoal too.http://www.exo.net/~pauld/activities/AlAirBattery/alairbattery.htmlThanks geezer for that link. However what I am trying to do is make a battery at the lowest possible cost. The idea being that people who have no electricity and very little money would be able to resource the ingredients locally and provide themselves with some lighting. This would hopefully allow people less fortunate then ourselves to at least have the possibility of being able to study or all of the other things you can't do without light in the evenings.
As I recall, Al is very good because it is so reactive. Unfortunately, because it is so reactive it also oxidises very quickly, and the oxide impedes further reaction. However, if you can figure out a way to remove the oxide mechanically or by some other means.......
Aluminum battery science?