Our Best performing Duracell Optimum alkaline AA battery has a cathode system that can deliver up to 200% Extra Life in some devices, or Extra Power in other devices (Delivers extra life in AA-size batteries compared to the Minimum Average Duration of the 2015 IEC Digital Camera test (IEC’s website) OR extra power in certain devices vs. Next best Duracell alkaline AA. Results may vary by device or usage pattern. For more info: Duracell’s website). Duracell Optimum batteries are available in AA, AAA formats. Upgrade your device with Duracell’s most groundbreaking innovation yet. OPTIMUM STORAGE: Duracell Optimum’s pack keeps new batteries in place and allows secure storage of used ones for recycling. 100% RECYCLABLE PACKAGING: Duracell Optimum’s packaging is 100% recyclable and 0% plastic. Pack of 4 batteries. 1.5V. Manufacturer’s 1 year guarantee. EAN: 5000394137486.