The Energizer Max series batteries are characterized by lasting performance and innovation. Rely on Energizer Max batteries for enduring power in all your everyday devices. They maintain their performance during storage for up to 10 years, ensuring you have power available when you need it most. Additionally, the Max AA batteries offer leak protection for up to 2 years after complete use, safeguarding your devices. Count on the long-lasting performance and device protection for your toys, flashlights, remote controls, and other high-quality devices, just as you expect from Energizer. Up to 2 years for fully used batteries in devices.