The product picture may differ from the actual product. Only for your reference.
Energizer Hearing Aid Batteries - 24 X Size 10 Zinc Air
SKU: icsaq668795
What makes the ZA10 Zinc Air battery unique is that it uses oxygen from the atmosphere. It has a small hole in the case that allows air into the battery, which is used as part of the chemical reaction. The ZA10 battery is not activated until the plastic seal is removed. Typical applications are hearing aids, pagers and personal medical instruments. Hagen RE4/RE5 covert earpieces work very well with our ZA10 cells.