A small zinc air battery powers the majority of today’s hearing aids. The small colored sticker on one side of the battery keeps the battery inactive until you remove the sticker. Once the sticker is removed from the back of the battery, oxygen in the air contacts the zinc within the battery, and the battery is “turned-on”.
Placing the sticker back on the battery will not prolong its life. Zinc-air batteries have a shelf life of up to three years when stored in a cool, dry environment. Storing zinc-air hearing aids in the refrigerator has no beneficial effect on their shelf life, in fact, quite the opposite may happen causing the battery to discharge before it’s used. The best place to store batteries is in a cool dry place.
We’re often asked why hearing aid batteries vary in how long they last. Here are a few reasons why.
- In the presence of loud noise, more features of the hearing aid may be active longer requiring the batteries to work harder and discharge sooner.
- Low humidity can dry out a hearing aid battery
- High humidity can interfere with the function of the battery
- Low temperatures or high altitudes can also shorten the life of the battery
- Changes in your personal hearing habits, for example extending the length of time you wear the hearing aids can lessen the life of the battery
- Excessive perspiration can create a rusting effect at the point where the battery touches the contacts causing the battery to work intermittently.
All of these can lessen the life of your hearing aid batteries. If you notice that your batteries are not lasting as long as they used to and you’re not able to identify why, call us we can help.