For power you can rely on, choose Energizer Max AA batteries. They feature Power Seal Technology, which holds power for up to 10 years while in storage, providing long life for the devices you use every day.Always keep extra batteries on hand. World's 1st Zero Mercury AA Alkaline Battery. Energizer is a leader in the industry in powering people's lives responsibly. Up to 10 years shelf life. Package of four batteries.