These are nickel-cadmium batteries (rechargeable batteries) manufactured around 1989. I liked the design and kept them as part of my collection. Please note that they do not function as batteries. How about using them as art materials? Rare National (Matsushita Electric) Pananica brand. AA size. Buyer pays shipping. They are not lithium-ion batteries and are completely discharged, so there is no risk of ignition.