Different Functions of Hearing Aid Batteries


You need to ask yourself about a hearing aid battery. These include: how long they last, size, and charge. Learn about Lithium-ion and Zinc-air batteries. There are many benefits of Lithium-ion batteries, so you may want to consider this battery type if you have a hearing aid.

Charge time

The charge time for hearing aid batteries varies depending on the type of device you have and your habits. A size 312 rechargeable battery typically provides about 350-400 charging cycles, and a size 13 battery can last for about one year. Most people charge their hearing aid batteries once a day and leave them overnight, but setting them up more than once will drastically reduce the battery life addition, hearing aid batteries tend to lose capacity as they age, so you may only get six to eight hours of wear from an initial 312 battery.

Rechargeable hearing aid batteries eliminate the need for batteries to be replaced every few weeks. In addition, hearing aid rechargeable batteries are easier to open and handle, giving you more convenience. Some rechargeable hearing aid batteries can be charged quickly during the day, giving you several hours of wear time. However, you should know that they have some limitations, so it’s best to consult an audiologist.

Zinc-air batteries

These air-activated hearing aid batteries power the high-demand current in many hearing aids. These batteries deliver more energy than standard hearing aid batteries yet are much smaller. Future hearing aids will use smaller integrated circuit geometry, and they’ll also be more energy-efficient.

Activate the battery before use. Activating the battery is necessary as it cannot be reused after removing the sticker. Choose the correct size battery based on your hearing aid model. There are different sizes of batteries for different styles of hearing aids, and larger hearing aids require more power. Zinc-air hearing aid batteries are available in color and number-coded packages. These labels tell you what size battery is inside. Store these batteries in a dry environment at room temperature to prolong their life.

Lithium-ion batteries

Lithium-ion batteries are versatile in many applications, including hearing aids, Lithium-ion batteries have a high energy density, allowing them to power devices for over 24 hours at a stretch. These batteries are also ideal for smaller devices, such as hearing aids. However, they can cause problems if not cared for properly.

These sealed es prevent water from seeping into the hearing aids. However, lithium-ion batteries can be a fire hazard if not handled properly. Therefore, lithium-ion batteries are only safe to use in devices that use these batteries. In addition to protecting the user, these batteries do not contain any toxic materials.


The manufacturers developed color-coded systems to help you find the correct hearing aid battery. Those in yellow, orange and blue are the sizes of hearing aid batteries. The higher the number, the larger the battery.

The size and type of hearing aid battery you choose will determine how long your device will operate. For example, size 312 batteries last about three days, whereas size 13 hearing aid batteries last between one and two weeks per charge cycle. These are estimates based on average usage. If you don’t wear your hearing aids for more than three hours each day, your battery life will be shorter. To make sure, try using different batteries for a few days and see what works best for you. If you’re unsure, you can always consult your audiologist.

Sizes of disposable hearing aid batteries

Hearing aids come in many different sizes and styles and with different power needs. Larger hearing aids require larger batteries. Additionally, hearing aids for people with severe or profound hearing loss typically require more power and larger batteries.

There are five sizes of hearing aid batteries available on the market. The sizes from smallest to largest are: 5, 10, 312, 13 and 675. Size 5 hearing aid batteries are rarely used. The four most common hearing aid battery sizes are all smaller than the diameter of a dime:

  • Size 10 – 5.8 mm wide by 3.6 mm high
  • Size 312 – 7.9 mm wide by 3.6 mm high
  • Size 13 – 7.9 mm wide by 5.4 mm high
  • Size 675 – 11.6 mm wide by 5.4 mm high

Color-coding for disposable hearing aid batteries

Because size differences may be hard to notice and difficult to remember, battery packaging is color-coded so finding and purchasing the correct ones is easier.

  • Size 10 batteries – yellow
  • Size 312 batteries – brown
  • Size 13 batteries – orange
  • Size 675 batteries – blue

Battery life for hearing aid batteries

Non-rechargeable hearing aid batteries can last anywhere from five to 14 days, based on a 16-hour day of wear. This is dependent upon the size of the battery and power needed by the hearing aid. Typically, smaller batteries have shorter battery life than larger ones.

The average lifespan of hearing aid batteries is as follows:

  • Size 10 – three to seven days
  • Size 312 – three to 10 days
  • Size 13 – six to 14 days
  • Size 675 – nine to 20 days

If you are experiencing shortened battery life, there may be an issue with the hearing device. In this case, you should consult your user manual or contact your hearing healthcare professional to make sure everything is working properly.

How to extend the life of a hearing aid battery

While there aren’t any foolproof ways to extend non-rechargeable battery life, these tips will ensure the power isn’t being wasted.

Turn the hearing devices off when not in use and leave the battery compartment door open overnight. Not only will this help keep battery power from being wasted, it will allow any moisture that has built up from the day’s use to evaporate overnight.

To get optimal performance from your batteries, always store them at room temperature. Heat exposure and humid environments such as a bathroom will shorten battery life. Also, batteries shouldn’t be carried loose in pockets, a purse or a backpack where they might come into contact with other metal objects like coins or keys that can short-circuit the hearing aid batteries.

More: How to get the most from your hearing aid batteries

Hearing aid battery brands

Common manufacturers of non-rechargeable hearing aid batteries include Rayovac and Energizer. However, many hearing aid manufacturers sell batteries wholesale to hearing care professionals, and the batteries may carry the brand name of that hearing aid manufacturer.

Another common practice is private labeling of batteries. This means the hearing care professional may purchase batteries wholesale and have them labeled with the name, address, phone number and logo associated with their office.

Regardless of the branding, most hearing aid batteries are made by trusted companies that produce other types of batteries for all types of electronics.

Hearing aid battery safety

According to the National Capital Poison Control Center, more than 3,500 Americans of all ages swallow disposable button batteries every year. If this happens to a person or pet in your home, seek medical attention immediately.

More: Hearing aid battery safety and disposal

Where to purchase hearing aid batteries

Batteries are typically available in mass retail stores, pharmacies, grocery stores, electronics stores and through online retailers.

You might also choose to purchase batteries through a hearing aid center near you. Because hearing care providers go through their stock of batteries quickly, many wearers feel they are getting fresher batteries. Also, if you forget what battery size you need for your particular device, the hearing healthcare professional will ensure you are purchasing the correct one.

Additionally, it’s worth asking if your hearing health practitioner offers any kind of battery club or discount program. These programs can save you money on your battery purchases and, in some cases, you can request the batteries be sent directly to you saving you a trip to the office.


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