In one exemplar embodiment, a biological source of electrical power is provided. The electrical power source comprises a pair of electrodes formed of elements having differing electromotive force. Interposed between the electrodes and in contact with them is an electrolytic material comprising an aqueous brine solution containing coexistent aerobic and anaerobic bacteria derived from a marine organism source mixed with a bacteria nutrient and filler composed of a finely divided cellulose material. All of the aqueous brine solution containing the bacteria is absorbed and carried by the finely divided cellulose material insuring that no free liquid remains. The aqueous brine solution containing the bacteria acts as the electrolyte for the power source and when an external load is applied to the terminals a usable voltage and current are produced.