This are often used in conjuncture with Capacitor for short term but regular use and to trickle charge batteries for long term but irregular use
The potencial of these have yet to be uncovered. They can be made by a wide range of materials
Marus Reid
John Hutchison
John Hutchison's Crystal Battery This is the first time i've seen this cell. John is a self-taught physicist that carried on Nikola Tesla's work. A lot of his work consist of Radio-waves and Tesla Coils. He's accomplished gravity manipulation to levitate objects and make metals act in new states.