Duracell Optimum AA batteries, our #1 best performing alkaline batteries, are formulated with 4X the patented POWER BOOST Ingredients vs Coppertop AA. Compatible with any AA battery-operated device, these AA batteries are packaged in a reclosable pack for a more organized way to store your batteries. Duracell guarantees these batteries against defects in material and workmanship. From storm prep to holiday needs, Duracell is the #1 trusted battery brand for the moments that matter most.