Duracell?s most groundbreaking innovation yet. Duracell Optimum Batteries are packaged in a new slider pack with a resealable storage tray, that provides a more organized way to store your batteries (no more loose batteries everywhere!). Duracell is the #1 trusted battery brand, and we're proud to offer you Duracell 1.5-Volt Optimum Alkaline AA batteries as part of Duracell?s trusted lineup of batteries. *Extra Life or Extra Power vs. Coppertop AA in a wide range of devices