Quote:
Originally Posted by Awd180
The greenest battery though least efficient is a potato.
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How about an Electric Eel?
It doesn't even need the refined metals for the anode and cathode that the potato battery does.
Up to 600V and 500W ... from each ~22kg "Eel Cell"... Put electrically in parallel for more watts of power , or longer durations of power.
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Although I wonder if in the long term / plant wide basis ... would be nuclear cells ... Over all across the whole planet the same amount of radiation will be emitted by the radioactive decay ... weather it is harnessed in a battery or not.
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Non-Toxic capacitors ... might also be an alternative ... although harmful things can be used to increase performance ... a lower preforming capacitor can be made from completely non-toxic 'green' materials.
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Trees can also produce small voltages ... as a type of battery ... due to the potential difference created by photosynthesis ... even more so twice a year when the sap flows to or from the roots.
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There is also a variation on the 'earth' battery ... not getting it's majority from the decomposition of dismillar metals but instead ... tapping into the earth's ... telluric current ... again small voltages ... but it re-charges naturally all by itself ... and no toxic components can be used for such devices.