FeaturesNo hearing aid battery lasts longer than Rayovac®, the NO 1 choice of audiologistsWorlds longest lasting mercury free hearing aid batteryRecommended by 8 of 10 hearing health professionals2nd generation, mercury free formula with higher voltage for quick start-upSuperior cell design that resists swelling & leakage, providing optimal performance and greater consistencyOur longest tab available makes removing the battery from the package and inserting into the device easyPerforated package allows the dial to be removed for convenient transportEnvironmentally friendly package made with recycled or recyclable materials