This is pretty amazing. They’ve known since the 19th century that putting zinc and copper electrodes into a potato could produce a current, but now with a simple twist, they are able to produce a light source which actually lasts for days or even weeks.
They are believing this is going to benefit literally millions of people. Potatoes are plentiful and they don’t need any refrigeration, meaning third world countries could have a cheap and effective form of long lasting light, without having to be plugged into a grid system. And they’re 6 times more economical than kerosene lamps. This is also big news for others in developed countries who are into living off-grid. Check out how this potato light source works and how it could benefit so many.
Via : Yixes