Thomas Pfeifer does something new and amazing every day. This time he demonstrates how simple digital clock or LED diode can be powered by using batteries made of few potatoes and two different types of metal (iron and coper). Demonstration shows that such battery made from single potato generates 0.848V voltage and is able to to give up to 130uA.
He used three potatoes connected in series to power digital clock or light the LED.
More photos is here
