Energizer ac312 da312h l312a size 312 hearing aid 4pk batteries (brown)

Type: Zinc Air
Voltage: 1.4 V
Color Coded: Brown
Diameter: 7.9 mm
Height: 3.6 mm

Also known as: VT312, XL312, AP312, 312HPX, 312A, R312ZA, 312AE, L312ZA, AC312E, ME7Z, DA312X, ZA312, V312AT, PR41, DA312H, AC312, 7002ZD, PR41, AC312E, V312A, B347PA, DA312, 312HPX, PR-312PA, PZA312

The ZA312 is a popular battery for in-canal and in- ear hearing aids. All manufacturers colour code this battery brown for easy identification.

What makes a Zinc Air battery such as the ZA312 unique is that it uses oxygen from the atmosphere. The ZA312 has a small hole in the case that allows air into the battery, which is used as part of the chemical reaction. The ZA312 battery is not activated until the plastic seal is removed uncovering this hole. Typical applications are hearing aids, pagers and personal medical instruments.