You'll love hearing this - Energizer has its longest-lasting hearing aid batteries ever. And trust us, we know a thing or two about ears. Our PowerSeal technology protects your devices against leakage and our zero-mercury design means less impact on the environment. These batteries deliver consistent sound quality across their life span for a better hearing experience. The EZ Turn & Lock technology is easy to use - Just spin the wheel to access the battery, install using our extra-long tabs and reseal the package to keep the other batteries safely inside. Get our best performance and enjoy hearing everything the world has to offer.