Manufactured by Varta-Microbattery, Power One is the most advanced hearing aid battery manufactured in Germany. The PowerOne 675 Implant Plus battery is the only cochlear battery endorsed by the Cochlear Company. Their unique High Power design offers superior performance in Cochlear Implants.  PowerOne is one of the few brands to use stainless steel cans for all of their zinc air batteries, which does not rust when subject to high humedity.