The Energizer Max AA Batteries - 8 Pack are designed to protect from leakage better than the other leading battery for up to two years after fully used when left in low drain devices. The proprietary Power Seal Technology is assurance that you will have power you can rely on, whether you are capturing baby's first steps, competing in the final level of a video game or preparing for a storm on the horizon. A 10-year shelf life means that you can be confident you will always have power when you need it most. This is the world's first zero-mercury AA alkaline battery. It is designed to meet all of your battery needs.