Ultimate Guide to Hearing Aid Batteries


Just as there are many types of hearing devices, there are different types of batteries to choose from. They are one of the best inventions of this century and millions of people use them all over the world. Depending on the type of device you have, you want to be sure you’re getting the correct hearing aid battery.

Once you have bought a hearing aid or hearing amplifier, there are a couple of things to keep in mind to take care of your device and prolong its life. The proper battery is one of the most important part of the hearing device. You can think of it as the heart of your device, or the engine that keeps it alive.

Batteries being one of the most important ones as they power the hearing aid to help you hear sounder and clearer. But, once you’re out in the market to purchase batteries, you’ll be hit with many different options.

So, if you’re unsure as to what each battery type has to offer, you will always be confused. The purpose of this article is to discuss the types of batteries which common hearing aid devices use, their positives, negatives, and all other information.

Without further ado, here is the complete guide to everything you need to know about hearing aid batteries, their types, sizes, and lifespans.


Different Hearing Aid Battery Sizes 

  • Size 10 Batteries- You can find these in mini receiver in the ear (RITE) and completely in canal (CIC) hearing aid. You can also use them in smaller hearing aid devices and fit perfectly in them.

The measurements for the size ten battery size 10 are 5.8mm x 3.6mm, and they are easy to identify by their yellow color. Keeping their frequent use in mind, the life span of the size ten batteries is approximately closer to 3-10 days and might last even longer if dealt with efficiently.

  • Size 13 Batteries- They are the best fit for in the ear (ITE) and behind the ear (BTE) hearing aids.

The measurement for such battery size is 7.99mm x 5.4mm, which is slightly larger than the size ten batteries. These are available everywhere and you can identify them by their orange color. The average lifespan of size 13 batteries is somewhere in between 6 to 14 days and might last longer.

  • Size 312 Batteries- They are used in mini RTE, BTE and ITC hearing aids.

These batteries are usually available in the measurement of 7.9 mm x 3.66 mm. Brown is the color in which these batteries are available. Their lifespan is less than size 13 batteries and usually last 3 to 10 days at most.

  • Size 675 Batteries- These batteries are used for higher power in BTE hearing aids.

These batteries are usually 11.6mm x 5.4 mm in size. They are color coded in a bluish color. The 675 batteries also have the longest lifespan of all the other batteries. They usually last nine days and at most might last for 20 days!

  • Size 5 Batteries- The final battery size I will mention is the Size 5 Hearing Aid Battery. They are not popular anymore and are obsolete now. However, you can still find them at electronic stores if you have a device which requires these.

Rechargeable Hearing Aid Batteries

Traditionally, people would keep many batteries as backup whenever they would travel. Even at home, there would be many backup batteries so the hearing aid wouldn’t stop working.

A more suitable and convenient way is to use rechargeable batteries instead of disposable batteries. It helps you be care-free about your battery usage and use the device without any issues.

These rechargeable batteries use the latest technology this era has to offer and provide a high-quality sound.

The Lithium-ion batteries are one of the rechargeable batteries for hearing aid using lithium-ion technology. This means that you can use the same batteries for the same hearing aid multiple times. They just need a quick charge, and they will be ready for service. You normally get a basic charger when you purchase the batteries. And you can always buy one yourself, if you need to.

The rechargeable batteries are more optimal then disposable batteries as they can last up to a year with a comparable price and no stress of batteries failing at critical situations.


Zinc-Air Button Disposable Battery

The most common type of battery, is the zinc-air button disposable battery. These batteries are air-activated which means they are not activated (ready to use) until their factory seal is removed. The seal allows the hearing-aid battery to remain dormant.

Once you remove the sticker or seal, the zinc in the battery quickly interacts with the oxygen in the air. This causes a chemical reaction which takes place and activates the small battery.

Clearly, the best way to use the zinc battery is to wait a few minutes so that zinc has properly interacted with the oxygen. It will be fully active by the time you put in your hearing aid. So, always give it a few minutes and only then power your device.

There are different sizes of these hearing aid batteries available in the market according to everyone’s convenience and need.

The sizes of these batteries depend upon the sizes of hearing aid, i.e., larger hearing aids require larger batteries. In addition to that, people with more damaged hearing senses require a profound hearing, which requires more power hence the larger batteries.


Tips to Increase Hearing Aid Battery Life

There are few tips to increase the battery lifespan that can surely help you save power.

  • When using the batteries for the whole day, they build up moisture, which is corrosive. To evaporate that moisture leaves the compartment for the battery open overnight.
  • When the hearing devices are not in use, turn them off. This will help to avoid wasting power draining the battery sooner than expected.
  • Store the batteries on room temperature for the most favorable performance as heat and extreme weather conditions can shorten the life of the battery.
  • Don’t carry the batteries in loose pockets such as purses or backpacks to avoid any contact with other metal objects that can later cause short-circuit in the hearing aid.

Best Places to find Hearing Aid Batteries

There are multiple manufacturers of hearing aid batteries including Duracell, Rayovac, PowerOne, and Energizer.

You can find these or any other batteries for hearing aids at many pharmacies, general or grocery store, online retailers or electric store suppliers.

For online retailers, you can always find reasonable batteries on Amazon and eBay.