Method of construction of an ultraminiature high energy density cell

A method for constructing an ultraminiature electrical cell comprising the steps of adhering a first solid active electrode material as a layer on the lower end of a hollow metal needle;

• adhering a second solid active electrode material as a layer on the inner surface of an elongated cylindrical metallic container, said container having a volume of less than about 0.01 cubic inch and being open at one end thereof with the inner surface of said second electrode material layer forming a cavity having a diameter greater than that of said needle with said layer of first solid active electrode material thereon;
• securing means for sealing the open end of said container on the upper end of said needle;
• thereafter axially placing a separator and said needle, lower end first, within said cavity with said sealing means in position to seal said container;
• introducing an organic electrolyte solution through said needle;
• and closing the end of said needle above said sealing material.