Long lasting power and innovation is what the energizer max family is all about ndash up to 5 year shelf life for 9v batteries plus powerseal technology is the energizer innovation that delivers energy you can rely on 1 package of 1 9v alkaline batterie best for everyday electronics up to 5 year shelf life so yoursquoll always have power when you need it powerseal technology is the energizer innovation that delivers energy you can rely on nbs