It is not easy to give a single answer to the question “Which type of hearing aid battery do I purchase?” because hearing aid models and designs are so different, and so are the batteries used to power them. The easiest scenario to address is if you already wear a hearing aid; in that case, check the owner’s manual that was included with the device or get in touch with the hearing care provider who fit it for you to determine the correct type of battery. If you are still looking for a hearing aid and trying to decide which type is best for you, you might wish to do some research to help you in your decision. The reason for this is that hearing aid batteries differ in price and in battery life, and so a rough knowledge of how many of them you will need over time may influence your choice of which hearing aid to get.

In order to make life easier for buyers, hearing aid makers and the companies who make the batteries for them have established a standardized color coding system to make the right size easier to locate. Irrespective of who the manufacturer is, hearing aid batteries of a certain size and type will always have the same color code on their packages.

The 4 most common varieties are:

Blue (#675) – The color blue always means Size 675 batteries. These batteries are rather large and will hold a longer charge – roughly three hundred hours. Size 675 hearing aid batteries are common in larger Behind-the-Ear (BTE) hearing aids and in cochlear implants.

Yellow (#10) – Size 10 hearing aid batteries are identified with a color code of yellow, and are the most common nowadays, being used in a large number of Completely-In-Canal (CIC) and In-The-Canal (ITC) styles; because of the smaller size, they have an estimated battery life of 80 hours.

Brown (#312) – Size 312 hearing aid batteries always carry a color code of brown, and are typically used in In-The-Canal (ITC) and In-The-Ear (ITE) types of hearing aids; they have an average battery life of 175 hours.

Orange (#13) – Size 13 batteries are often found in In-the-Ear (ITE) and Behind-the-Ear (BTE) hearing aids, and have a normal battery life of 240 hours.

Some kinds of hearing aids demand alternative batteries, but that is uncommon. Most in-store providers of hearing aid batteries stock the common battery sizes above, but if you request a specific type, they can usually obtain it for you.

Be sure to read your owner’s manual carefully before buying large quantities of batteries. If your device runs on rechargeable batteries, you’ll only need throw away ones as a back up. Also be aware that hearing aid batteries lose their charge over time. You’ll get the best battery life by purchasing batteries that are fresh and storing them in the unopened original package in a cool location until you are ready to use them.