... weight, 70% weight of silver zinc and zinc-manganese battery. 6, Environment-friendly, RoHS compliant. 7, Abundant raw ... silver resource restricts the yield of Zn-Ag button battery. Abundant materials in Li-FeS2 ensure the mass ... button battery.Application:Digital calipers, calculators, DV, electronic clocks, medical equipment, electronic dictionaries, measuring instrument, sensors, plug-in computer, ...