... Li-FeS2 button battery∴ In 2006, Heter company was developing a new kind of iron button battery---1.5V Li-FeS2 button cell.∴ In 2007 ... , 1.5V Li-FeS2 button cell was finished designing and ... in Li-FeS2 ensure the mass production of Li-FeS2 button battery.Application:Digital calipers, calculators, DV, electronic clocks, medical ...