Powerone batteries are manufactured in Ellwangen, Germany, at the world's most up-to-date and biggest production site for hearing aid batteries. They are produced on fully automated high-speed lines. The high degree of automation of this process means that very few manual operations are required - the risk of error is therefore minimal. Everything from one source: power one is the only manufacturer in the world to supply a complete range of rechargeable batteries and innovative chargers in addition to zinc air batteries.