Duracell CopperTop Duralock C cell batteries are new and improved to meet the growing demands of consumers. The technology has been upgraded for better performance in popular battery powered devices. Duracell C batteries are recognized worldwide as a leading source for quality and performance. The Duralock technology allows the batteries to last up to 10 years in storage.Duracell C alkaline batteries MN1400 are sold in OEM bulk cases, though smaller quantities are hand-packed. Discounts are available for orders of 12 or more batteries. Duracell Duralock batteries are made in the U.S.