POWER SEAL TECHNOLOGY Holds Power for 10 Years *(When Not In Use) World's First Mercury Free Alkaline Battery Energizer Max AA Batteries now hold their power for 10 years. Our proprietary Power Seal Technology is assurance that you'll have power you can rely on, whether you're capturing baby's first steps, competing in the final level of a video game marathon, or preparing for a storm on the horizon. A 10 year shelf life means that you can be confident you'll always have power when you need it most. That's positivenergy!