Biocompatible rechargable energization elements for biomedical devices with electroless sealing layers

A biocompatible energization element comprising

• a cathode spacer layer;
• a first hole located in the cathode spacer layer;
• a first current collector coated with anode chemicals, wherein the first current collector is attached to a first surface of the cathode spacer layer, and wherein a first cavity is created between sides of the first hole and a first surface of the first current collector coated with anode chemicals;
• a separator layer, wherein the separator layer is formed within the first cavity after a separator precursor mixture is dispensed into the cavity;
• a second cavity between sides of the first hole and a first surface of the separator layer, wherein the second cavity is filled with cathode chemicals;
• a second current collector , wherein the second current collector is in electrical connection with the cathode chemicals;
• an electrolyte comprising electrolyte chemicals;
• and
• a plated metallic exterior coating, wherein the plated metallic exterior coating comprises a portion that is plated with electroless plating, and wherein the thickness of the plated metallic exterior coating is thick enough to act as a barrier to ingress and egress of moisture from the biochemical energization element, and wherein a blocking material prevents the plated metallic exterior coating from forming in the region of one or more of the anode contact and the cathode contact.