DISCLOSED IS A HIGH PERFORMANCE OXYGEN-DEPOLARIZED GALVANIC CELL WHICH IS CAPABLE OF SUPPLYING ELECTRIC POWER AT EXTREMELY HIGH ELECTRODE CURRENT DENSITIES. THE CELL BASICALLY INCLUDES A POROUS, ELECTROLYTE ABSORBENT, EXTENDED AREA ANODE MADE FROM AN ELECTROCHEMICALLY ACTIVE METAL, A THIN, POROUS FIXED ZONE OXYGEN-DEPOLARIZABLE CATHODE AND A POROUS IONICALLY PERMEABLE SEPARATOR INTERPOSED BETWEEN THE ANODE AND CATHODE AND CONTAINING AN ALKALINE ELECTROLYTE, THE ALKALINE ELECTROLYTE BEING AN AQUEOUS SOLUTION OF POTASSIUM HUDROXIDE HAVING A CONCENTRATION OF BETWEEN ABOUT 10 AND 14 NORMAL.