Duracell’s most groundbreaking innovation yet. The all new Duracell Optimum alkaline battery has a new cathode system that can give your device Extra Life*—like toys that run longer—or Extra Power*—like brighter flashlights. 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