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Hearing Aid Batteries

Every hearing aid needs a battery to power it. Even the best hearing aid will perform poorly if the batteries are running low. Unfortunately, not all hearing aids take the same battery, so it's crucial to understand what type you're looking for. At Independence Hearing, we take the guesswork out of this process and help you find the right batteries for your charging needs.

Battery Types

Hearing aid batteries use zinc-air, a type of battery technology. These rely on the battery being subjected to oxygen from the air to activate it. The first time you buy hearing aid batteries, you'll notice how they are covered with a small plastic strip. That's not an accident - it helps to keep the cell charge dormant until it is intentionally activated.

Here are some of the common hearing aid battery types:

  • 675: This is a button-shaped cell which is about half the size of a quarter. As they are on the larger size, they are often used with behind-the-ear hearing aids. The size also makes them the longest lasting battery - it will provide power for nine to 22 days.
  • 13: As it is slightly smaller, this type is generally used in in-the-ear devices that are smaller in size than the behind-the-ear style. But the battery life is reduced accordingly – these cells run for six to 14 days.
  • 312: Measuring 7.9 mm by 3.6 mm, the 312 battery is the same diameter as the 13, but it is less thick. This makes it easier to fit on smaller models. The battery life is from three to 10 days.
  • 10: This is the smallest hearing aid battery out there and is primarily used for completely-in-canal devices. It also has the shortest battery life, lasting for only three to seven days.

Extending the life of batteries

Changing the battery on your hearing aid is simple. But for those looking to maximize their battery usage, here are some tips:

  • When activating the battery, wait a full five minutes before inserting it into the battery compartment. This can improve battery life by as much as 80 percent.
  • Leave the battery door open when you're not using it. This makes sure the battery doesn't needlessly discharge and reduces the likelihood of moisture affecting the charge strength of the battery.
  • Don't let your battery get too hot or cold, as this can affect its performance.