Power One Size 312 MERCURY FREE Hearing Aid Batteries (60 batteries) Power One Size 312 Batteries, made in Germany. Mercury free and approved for use in Wireless hearing aids. 60 Batteries total. Product Details BrandPower OnSize312ManufacturerVarta Power OneProduct TypeHearing Aid Batteries Mercury FreeQuality seal on back ensures that the batteries have not been tampered with.Long lasting with an extra long tab to facilitate easy handling. Check out my other items. – Powered by