 Zinc air batteries operate very similarly to other button-cell batteries, with the significant difference being that other button-cell batteries are entirely self-contained. In contrast, zinc air batteries require oxygen from the external atmosphere in order to operate. This saves space as well as eliminates the need for an internal, often toxic, material. Zinc air batteries are neither reactive nor flammable to a great degree. The disadvantage of zinc air batteries is that they must be sealed from the outside atmosphere prior to use in order to prevent the battery from self-discharging. This in turn leads to a longer shelf life. The image at top left is a typical Zinc Air round battery. Additional information and a more detailed cutaway view are available by clicking on the image.
Zinc Air Battery Characteristics
| Type |
Primary |
| Chemical Reaction |
Zn + ½O2 + H2O --> Zn(OH)2 |
| Operating Temperature |
32º F to 104º F (0º C to 40º C) |
| Recommended for |
Hearing aids and pagers. |
| Initial Voltage |
1.4 volts |
| Capacity |
Varies |
| Discharge Rate |
Flat |
| Internal Resistance |
Low |
| Impedance |
Low |
| Storage Life |
Excellent shelf life. Self-discharge is nearly negligible until activated. |
| Storage Temperature |
32º F to 104º F (0º C to 40º C). |
| Disposal |
Not recyclable; check with your local authority (city/county/parish) for proper disposal. |
| Other Notes |
Zinc Air batteries are packed in an inactive state with a removable plastic seal. The seal must be removed, exposing the battery to atmospheric oxygen, in order to activate the cell. |
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