This Energizer ECR-2016BP Coin 72 mAh Single Use Batteries Lithium is a reliable option for powering your small devices. With an expiration date of 03/2030, these batteries have a long shelf life. They are designed as coin cell/button type and use lithium as their chemical composition. The pack includes one unit of CR2016 size batteries and each unit has a power capacity of 72 mAh. These batteries are suitable for various devices and are a great choice for those looking for a single use option.