6 Important Factors That Influence Battery Lifetime

It’s a popular talking point in our industry – how long will a hearing aid battery last?  And the answer is not a simple one. There are several factors that determine the life of a hearing aid battery.  Below we review the 6 most important factors and why battery lifetime can be so variable.

Factor #1
The Extent of the Individual’s Hearing Loss

The worse the individual’s hearing is, the more amplification they need.  Increased amplification requires greater power, which in turn reduces battery life.

Factor #2
The Size of the Battery

Hearing aids are becoming smaller and smaller to meet the demands for more discreet, cosmetically appealing instruments.  However, small hearing aids come at a price. They require small batteries and the smaller the battery, the shorter the battery life. The reason for this is that small batteries include fewer components than large batteries, which impacts how long the battery can last.

Factor #3How Much You Use Your Hearing Aid

The more usage a hearing aid gets, the shorter the life of the battery.

Factor #4Features Differ From One Hearing Aid to Another

Today’s hearing aids are feature packed and each feature has different power demands for a battery. Features like noise cancellation and multi-channel processing can reduce battery life by 20%.  Other premium features like FM looping, sound generation for Tinnitus patients and wireless/bluetooth can increase the current by up to 300%, which shortens battery life significantly.

Factor #5Environment

Humidity, temperature and altitude all have an effect on how long a battery will last.

  • As humidity is reduced, batteries can dry out reducing battery life
  • As humidity increases, batteries may take on moisture, interfering with the natural discharge expansion, resulting in swelling/leakage and reducing battery life
  • As temperature is reduced, hearing aid battery voltage is lowered and reaches functional end point earlier, reducing battery life
  • As altitude increases, the percentage of oxygen level in the air is reduced, lowering the hearing aid battery voltage, causing the battery to reach the endpoint earlier, reducing battery life

Factor #6Battery Life Expectancy

Batteries have ranges of expected life (in days) depending on the size of the battery.  For example, a size 10 battery has the life expectancy of 3 – 10 days.

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2 Responses to 6 Important Factors That Influence Battery Lifetime

  1. Eileen Filar says:

    Just wondering, like the clerk told me, batteries whether they are made by Walgreens or Energizer are
    ALL the same. ? Does the name brand matter? I think it would be good if the batteries always came with the hearing device forever.

    • gnresound says:

      This has some truth to it in that private label batteries sold by a drugstore chain or other retail outlet are often made by major battery manufacturers such as Energizer. The manufacturer may or may not be identified on the packaging. In many cases, it is not possible for the consumer to find out the battery manufacturer. Like other types of consumer batteries, there are some quality differences in hearing aid batteries. Hearing aid manufacturers may have a recommendation for a particular brand that their own testing indicates perform well with their products.

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