NIFE (Nickel Iron Hydride EDISON BATTERIES ) Unused old stock still in original packaging. These were developed for powering electric vehicles. Commonly found in forklifts. Have been known to be long-lasting. Can take extensive charge-cycling. Physical size similar to lead-acid battery. 3VDC. Add distilled water with powdered electro-lite package (potassium hydroxide) ONE PRICE TAKES ALL.