The all new Duracell 1.5-Volt Optimum Alkaline Battery has a new, proprietary cathode system that can deliver Extra Life in some devices or Extra Power in other devices. Duracell Optimum Batteries are packaged in a slider pack with a resealable storage tray that provides a more organized way to store your batteries.• Disposable batteries• Battery Chemistry: Alkaline• Nominal Voltage: 1.5V• Size: AA• 4-Pack Storage tray to help keep batteries protected & organized Resealable package for convenience 1.5V AA alkaline batteries | Duracell Optimum AA Alkaline Batteries, 4-Pack