Get the Renata Battery R ZA 10 for your hearing aids if you love your hearing aids and wish to keep them in good working condition. These batteries are a source of constant consistent power for your devices. They offer a nominal voltage of 1.45 V which is sufficient for smooth working of hearing aids. The Zinc air batteries are a great and environment friendly source for power for your device. These also have a long shelf life, allowing you to always have extra at home for the times you run out of batteries.