Add the Duracell Coppertop AA Batteries with Power Boost, 10 Count to your Subscribe & Save to get it for only $5.34. FORMULATED WITH POWER BOOST INGREDIENTS: Duracell Coppertop AA alkaline batteries contain Duracell’s 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