Keeping your hearing aids up and running all the time is crucial and this is why using the right pair of batteries is critical. The Renata Battery 312 is a superior quality zinc-air battery, especially designed for use in hearing aids. These are compatible with hearing aids from most brands. These support analogue, digital as well as high-power hearing aids. Designed to discharge in a uniform manner, these offer consistent power throughout the life and even towards the end of life. You get 6 batteries per blister card.