Duracell Optimum. Our Best performing AA Alkaline battery. Duracell's most groundbreaking innovation yet. Duracell Optimum alkaline battery has a cathode system that can deliver up to 200% Extra Life in some devices, or Extra Power in other devices. Extra Life: Duracell Optimum lasts longer than previous Duracell Alkaline in a range of mid to high drain devices. For example, it allows you to take up to 600 pictures with your Fujifilm Instax mini 11 camera or play for longer with your XBOX Wireless Controller. Extra Power: In other devices Duracell Optimum delivers more power than other Duracell Alkaline batteries to make them work better - e.g motors run faster in devices like some remote controlled cars. Optimum Performance meets Optimum PackagingDuracell Optimum's innovative 'book' style pack has a door and an organiser tray inside, which finally means no more batteries rolling around the kitchen drawer! Instead your batteries remain conveniently and securely stored until you are rea