These mercury free cells are manufactured in the world's largest and most up-to-date hearing aid battery plant in Ellwangen, Germany. We provide eco-friendly battery technology, produced under clean room conditions, with an enhanced safety and performance housing coating. These mercury free cells are manufactured using only high-grade and refined raw materials. Our energy management system is certified in accordance with ISO 50001. With the new international standard, energy consumption and energy policy are placed centre stage. These mercury free cells mean, for you, hearing aid energy with premium performance and durability with the patented stable high level of voltage that we provide.