How can we get electricity out of potatoes?

Question: How can we get electricity out of potatoes?
- Keywords:
  electricity,
  potatoes
Asked by 855fddk26 to Gonzalo, Ciara, Elaine, Yannis, Yvonne on 14 Nov 2017. This question was also asked by 4L3X.
- Gonzalo Delgado-Pando answered on 14 Nov 2017:
  
  You can use many foods as batteries. With lemons it works as well. Check this YouTube video: https://youtu.be/-fvmb4lchnA
  This happens because potatoes are a bit acidic and react with zinc from the nail and copper from the coin so they generate electrons that flow through the cable so they can give electricity.
  The thing is the quantity they generate is very small

Question: How can we get electricity out of potatoes?