They are Duracell Activair PR70 (also known as type 10) Zinc Air button batteries specifically designed for hearing aids. These are zinc-air batteries designed for hearing aids.
DURACELL Activair Size 10 Hearing Aid Battery with 60 Batteries
Duracell Activair Size 312 Hearing Aid Batteries 6 Pack 1.45V Zinc Air #####
Duracell Activair Mercury Free Hearing Aid Batteries Size 10 Various pack size
60 Duracell Activair Hearing Aid Batteries Size 10 Zinc Air 1.45V Mercury Free
Duracell Size 10 / 13 / 312 / 675 Activair Hearing Aid Batteries (60 Pack)
