It’s tricky to give a single answer to the question “Which size of hearing aid battery will I need?” because hearing aid models and styles are so different, and so are the batteries that they use to power them. For anyone that already wears a hearing aid the user manual should state clearly which battery size is required. Conversely you can contact the hearing care professional that sold you the aid to ask. In the event that you don’t wear a hearing aid yet and are still looking to decide which type and model is best for you, do a little research to help you decide. The kind of batteries that a hearing aid takes can greatly impact the lifetime price of the device because of variations in price and battery life.
The makers of hearing aids and hearing aid batteries have made life simpler for you by implementing a standardized color coding system, to help make locating the correct size easier. Hearing aid batteries of the same type and size will always have the identical color code on their packages, irrespective of who manufactured them.
The main hearing aid battery types you will encounter are:
Blue (#675) – The color blue always means Size 675 batteries. These batteries are comparatively large and can hold a longer charge – as much as three hundred hours. Size 675 hearing aid batteries are typical in cochlear implants and larger Behind-the-Ear (BTE) hearing aids.
Yellow (#10) – The color yellow indicates Size 10 hearing aid batteries. Size 10 are the smallest and most abundant size of hearing aid battery lasting an average of 80 hours. Size 10 batteries are commonplace in In-The-Canal (ITC) and Completely-In-Canal (CIC) hearing aids.
Orange (#13) – Batteries with the orange color code are Size 13, and common in In-the-Ear (ITE) and Behind-the-Ear (BTE) types of hearing aids; their battery life is considered to be around 240 hours.
Brown (#312) – A brown color code signifies a Size 312 battery, generally found in In-The-Canal (ITC) and In-The-Ear (ITE) styles of hearing aids; due to their smaller size they generally have battery life of 175 hours.
These 4 battery sizes address most hearing aids, but there are a few exceptions that call for alternative batteries. Most hearing aid battery retailers advertise and stock the more common battery types above, but if you request a specific type, they can normally get it for you.
Remember to consult the manual that comes with your device before buying batteries, because some of the modern hearing aids use rechargeable batteries, so you need disposable batteries only as a backup in case of emergencies. Also know that hearing aid batteries lose their full charge over time. You’ll get the best battery life by purchasing batteries that are new and storing them in the sealed original package in a cool location until you are ready to use them.