Extra hearing aid batteries size 312. Long-lasting mercury-free zinc-air hearing aid batteries - 1.45v. (60 batteries)

The Rayovac Extra (also known as Rayovac Extra Advanced) size 13 battery is a mercury-free zinc-air cell designed for high-performance hearing aids. It features "Active Core Technology," which optimizes the internal cell design to maximize capacity and provide stable power for high-drain activities like wireless streaming. Usage and Performance: Activation: Requires approximately 60 seconds after removing the orange tab for air to enter the cell and reach full operating voltage. Lifespan: On average, a size 13 battery lasts 5 to 7 days, depending on the hearing aid's power consumption and streaming usage. Shelf Life: Up to 4 years when stored in a cool, dry place with the tab intact. Device Compatibility: Suitable for larger Behind-the-Ear (BTE) and In-the-Ear (ITE) hearing aids that require consistent power for digital processing.