Hearing Aid Batteries
Zinc-air-battery-types by Marc Andressen is licensed under Attribution CC 2.0

You could make a strong case that the most vital component of your hearing aid is the battery: without it, nothing else works, and if it fails, your hearing fails with it. In this short guide, we’ll reveal to you everything you need to know about hearing aid batteries so that you can get the most out of your hearing aids.

How Hearing Aid Batteries Work

Hearing aids take a unique type of battery called zinc-air batteries. Each battery has a sticker that covers small holes on the top of the battery. Once the sticker is removed, air enters the battery through the holes, generating a chemical reaction that activates the zinc and makes the battery active. After the battery is live, it begins discharging power and reapplying the sticker will have no influence in conserving its life.

Hearing Aid Battery Types

Zinc-air hearing aid batteries come in four standardized sizes, marked with standard number and color codes. The four sizes, from largest to smallest, are:

  • 675-blue
  • 13-orange
  • 312-brown
  • 10-yellow

Each hearing aid makes use of only one of the sizes, and your hearing specialist will inform you which size you require. Keep in mind that the numbers and colors above are manufacturer independent, but that manufacturers often add additional letters or numbers to its packaging.

Hearing Aid Battery Life

Hearing aid battery life is reliant on a variety of factors. Many patients get up to one week of life out of a battery if they use the hearing aid for 12 or more hours a day, but this will fluctuate according to:

  • The size of the battery – larger batteries have a longer life.
  • The extent of hearing loss – More serious hearing loss calls for additional power.
  • Hearing aid features – wireless functionality, noise reduction programs, and multi-channel processing, for instance, require more power to operate.
  • Temperature – hot and cold temperatures can diminish battery life.

Your hearing specialist can discuss all of this with you, and can help you discover the proper balance between hearing aid performance and battery life.

How to Increase the Life of Your Hearing Aid Batteries

You can easily extend the life of your hearing aid batteries with one basic trick. Just after you remove the sticker to activate the battery, wait 5-7 minutes before placing the battery in your hearing aids. By removing the sticker and laying the battery flat side up for several minutes, air is able to completely activate the battery before you start using it, which lengthens its life.

A couple of other tips:

  • Keep the batteries away from coins, keys, or other metal items that could short the battery.
  • When the hearing aid isn’t being used, turn it off and store it with the battery door open. If you don’t intend on using your hearing aids for a prolonged period of time, remove the batteries completely.
  • Unopened batteries can last for years; nonetheless, newer batteries are preferable because each year that goes by decreases the life of the battery.
  • Store your batteries at room temperature. This tip is so crucial that the next section is dedicated to the issue.

How to Store Your Hearing Aid Batteries

There’s a dangerous myth out there advocating that storing your batteries in the refrigerator extends their life. This is not only untrue; it produces the opposite result!

The reasoning behind storing your batteries in the refrigerator is that the cold temperature will slow down the discharge of power. While this may be technically true, the amount of power you will save will be negligible, and the adverse effects of moisture will produce far greater negative consequences.

Storing zinc-air batteries in a cold environment permits micro condensation to form in an on the battery, leading to corrosion and a high risk of premature failure. Consequently, for ideal performance, simply keep your batteries away from extreme hot or cold temperatures and store at room temperature.

Managing Your Hearing Aid Battery Supply

Once you figure out how long your batteries last, on average, you’ll want to keep a month’s supply. If your batteries last 1 week, and you make use of 2 batteries (1 for each hearing aid), then you’ll end up using approximately 8 per month. Simply set 8 as your reorder target, and once you deplete your supply down to 8, order another pack. Alternatively, you may want to consider the price savings linked with bulk buys and maintain a supply that lasts a bit longer than one month. If you’re not sure, we are more than happy to help you design a plan and will handle all of your hearing aid battery needs. Just give us a call!


Have any additional questions? Speak with one of our hearing specialists today!