Brand new bulk packaging, in clear storage clam shells Now the alkaline battery you count on every day to power your smoke detectors and alarm clocks is even better. Energizer MAX 9V batteries, now with Power Seal Technology. Our 9V batteries hold their power for 5 years, so you can have assured you'll always have power you can rely on, whether you're helping to keep your family safe from fire or carbon monoxide or just wanting to start the day on time.. A 5 year shelf life means that you can be confident you'll always have power when you need it most. that's positivenergy Features: -Power Seal Technology extends across the full MAX product line, so you can be confident you'll always have power when you need it most. -Shelf life for MAX 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.