Hearing aid batteries from power one come from a long tradition: Made in Germany, they are among the worlds top-selling batteries. The reasons for their extraordinary success is: they combine the highest quality and reliability, an extremely long life and maximum comfort. At power one, every battery is tested before it leaves the works 100%. The comfort packaging then receives a quality seal, which safely seals and protects it. The rustproof batteries themselves have an outstanding service life, especially where high power demands are concerned. Behind all this is a special, patented technology that enhances the cell voltage.