FORMULATED WITH POWER BOOST INGREDIENTS: Duracell Coppertop AA alkaline batteries contain Duracellâs patented POWER BOOST Ingredients which deliver lasting performance in your devices. GUARANTEED FOR 12 YEARS IN STORAGE: Duracell guarantees each Coppertop AA alkaline battery to last 12 years in storage, so you can be confident these batteries will be ready when you need them | Duracell Coppertop AA Alkaline Battery, 24/Pack (MN1500BKD) | Quill