There is no single answer to the question “What kind of battery does my hearing aid require?” because hearing aid models and the batteries they operate on vary widely. For anyone that currently uses a hearing aid the user manual should clearly specify which battery size is required. Alternatively you may get in touch with the hearing care professional that fit you with the device to ask. In the event that you are still looking for a hearing aid and trying to decide which model is right for you, you may wish to do some comparison shopping to help you in your selection. The reason for this is that hearing aid batteries differ in price and in battery lifespan, and so an estimate of how many batteries you will need over time may influence your choice of which hearing aid to buy.
Fortunately, hearing aid battery product packaging uses a standardized system of color coding. Regardless of who the manufacturer is, hearing aid batteries of a specific size and type will always have the identical color code on their packages.
The main sizes and types you will encounter are:
Size 10 / Yellow – Hearing aid batteries with a color code of yellow are Size 10, and may be the easiest to obtain because they are typically used in Completely-In-Canal (CIC) and In-The-Canal (ITC) types of hearing aids; their battery life is shorter, approximately 80 hours.
Size 312 / Brown – Brown always means Size 312 batteries. These batteries are on the smaller side and normally maintain a charge for around 175 hours. These batteries are commonly found in In-The-Canal (ITC) and In-The-Ear (ITE) hearing aids.
Size 675 / Blue – Size 675 is coded blue, and is frequently used in Behind-The-Ear (BTE) hearing aids and in some cochlear implants; the 675 batteries are rather large and can hold a longer charge – as much as 300 hours.
Size 13 / Orange – Size 13 batteries are generally used in Behind-the-Ear (BTE) and In-the-Ear (ITE) hearing aids, and have an expected battery life of 240 hours.
These four battery sizes address most hearing aids, but there are a few exceptions that call for alternative batteries. If yours requires one of these alternate types, most stores that provide batteries can custom order them for you.
Be sure you read the owner’s manual that comes with your unit before buying batteries, because some of the modern hearing aids take rechargeable batteries, so you need disposable batteries only as a backup in case of emergencies. Also, remember to always store your hearing aid batteries in their unopened packages and at room temperature to ensure that they hold their full charge.