One of my wildest dreams was to build lemon or potato battery to power Raspberry Pi...
I always thought that it should be easy.
~14 years ago on some industrial fair one of companies was showing some small device powered by potato battery, so I thought that this should work with Rasbperry Pi too.
Problem is that according to science (or at least Wikipedia ;-)) lemon battery build from 1 lemon gives up to 1 mA of current...
And according to this site minimal current needed for RPi vary from 80 mA up to 1250 mA...
So it seems that I would need at least 80 lemons only to power RPi....
It doesn't look as viable plan ;-)
And it also seems that this company I remember wasn't showing working device ;-)
They would much more energy to power device, especially that this was some device connected to GSM modem ;-)
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