This page should answer most general questions about hearing aid batteries. If you have a specific question about your hearing aid battery that is not addressed here, please ask on the AAC Audiology Question and Answer Board or contact your local audiologist.
All hearing aids have batteries. They come in different sizes and have a positive side and a negative side and so it is important that the battery is inserted properly into the hearing aid. The average life of a hearing aid battery varies from 1 to 4 weeks depending on the size of the battery, the power of the hearing aid, the setting of the volume control and many other things.
All batteries currently sold are the Zinc-Air type. Zinc-Air batteries last longer then the older mercury batteries and are also much better for the environment. They come with a paper tab glued to the battery. This tab prevents the battery from draining while it is being stored. These batteries can be stored for over a year as long as the paper tab is never removed. To start a zinc-air battery, just remove the paper tab. Once a battery is activated, it will begin to drain. Putting the paper tab back unto the battery when it is not in use may slow the drainage slightly, but it will not completely stop it from draining.
Batteries should be stored in a cool, dry place. They should not be refrigerated as this may shorten the life of the battery. Hearing aid batteries are different then normal batteries in that they operate at full power until they are almost fully drained, and then they stop quite abruptly. They do not slowly get weaker and weaker like most other batteries. Because of this, a hearing aid user should own a battery tester and should always carry extra batteries. If a hearing aid is not going to be worn for an extended period, the battery should be removed from the hearing aid to prevent corrosion. The battery should also be removed if the hearing aid accidently becomes wet.
Batteries may be purchased from your audiologist, drug stores, and even some national organizations. Some brands do last longer then others and it is important that the batteries you purchase are as fresh as possible.
- #675 This is the largest size battery. It is usually used in Behind-The-Ear hearing aids. It has the largest storage capacity of hearing aid batteries.
- #13 This is the most common size of battery used for In-The-Ear hearing aids. It has less storage capacity then the #675, but it is also a smaller battery.
- #312 This is often used for In-The-Canal size hearing aids. It is thinner then the #13 battery and has a shorter total lifetime.
- #10 This is one of the smallest sizes available and is used for the Completely-In-the-Canal size of hearing aids. They don't have too much storage capacity, but the small size makes them ideal for the very small hearing aid sizes.
- #5 This is the smallest size battery currently available. It is not carried by some distributors. This battery is usually used when even a #10 battery is too large to be put into the hearing aid.
This article was submitted by:
Glen R. Meier, M.S., CCC-A, FAAA