EnergizerA(R) MAXA(R) batteries now hold their power for up to 10 years. Our proprietary Power Seal Technology is assurance that you&';ll have power you can rely on. Whether you&';re capturing a child&';s first fish, camping in the middle of nowhere, 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!(TM) Designed for long-lasting performance in the broadest range of device applications No added mercury means EnergizerA(R) MAXA(R) is an environmentally responsible battery that can be disposed of with regular household trash Reliable portable power that maximizes fun, productivity and safety Power Seal Technology extends across the full MAXA(R) product line, so you can be confident you&';ll always have power when you need it most Shelf life for MAXA(R) varies by product. Our AA, AAA, C, and D batteries have a shelf life of 10 years. Our 9V battery has a shelf life of 5 years.