a biochemically - powered self - exciting electric power source , comprising , inside a container for containing an electrolyte , an anode which is coated with a biochemical compound , a first electrode and a second electrode , which are electrically separated each other and are immersed in the electrolyte , and an electrical stimulator connected between the anode and the first electrode , a user load being arranged between the anode and the second electrode , the first electrode being made of electrolytic iron , washed with aqueous ammonia , the anode being made of pure nickel , and the second electrode being made of cadmium - plated iron .