Simplified hermetic packaging of a micro-battery

A method of forming a micro-battery, the method comprising:

• providing a first structure comprising a handler substrate, a release layer, and at least one metallic anode structure, wherein a metallic sealing layer is located on a surface of each metallic anode structure;
• providing a second structure comprising another handle substrate, a polymeric adhesive, and at least one metallic current collector structure embedded in the polymeric adhesive, wherein a wall structure having a cavity is located on a surface of each metallic current collector structure, the wall structure comprises a solderable metal;
• bonding the metallic sealing layer of the first structure to the solderable metal of each wall structure;
• and
• removing the handler substrate, the another handler substrate, the release layer, and the polymeric adhesive layer to provide at least one micro-battery.