With a capacity retention of 82% after 10,000 cycles, the first Stable Solid-State battery has come as unconventional electrolyte mix composed of Lithium-Germanium-Phosphorus-Sulfide and Lithium-Phosphorous-Sulfide-Chloride. The first is usually unstable and fails rather quickly. The second is a highly conductive solid state electrolyte material, though way more stable, still presents the same problems as the first one.