32 pack of Rayovac Size 312 Hearing Aid Batteries to power your listening device These hearing aid batteries size 312 provide long-lasting power to hearing aids based on ANSI performance tests The batteries you depend on to power listening devices and hearing aids for dependable hearing assistance These 312 batteries hold power for up to 12 years in storage Rayovac 312 hearing aid batteries that are made to last, not to leak Feel confident knowing you have the long-lasting power and protection you expect from Rayovac