Replacing batteries is a necessary part of wearing most hearing aids. Hearing aid battery life depends on a series of factors. Here is a summary:
The first factor is the battery size. There are four different hearing aid battery sizes. Here they are listed from smallest to largest:
- Size 10
- Size 312
- Size 13
- Size 675
As the battery gets larger the life span also increases.
Degree of hearing loss and the amplification needed
The second factor is the degree of hearing loss and the amplification needed. Mild hearing losses require only a small amount of amplification from the hearing aids while a severe hearing loss would require a significant amount of amplification from the hearing aids. The more amplification that is needed means more draw on the battery for the hearing aids to be able to produce that amount of amplification. Also, it is very common that each ear on an individual has a slightly different hearing loss. No two ears are exactly the same. Therefore, even when one individual is wearing a set of hearing aids, each hearing aid may send different amplification to each ear causing different amounts of battery drain for each hearing aid. The hearing aids may not produce the low battery warnings at the same time because of that. It is recommended however, to change both batteries at the same time since the other hearing aid will likely need the battery replaced within a few hours anyway.
Hearing aid features affects battery life
A third factor of hearing aid battery draw is the number of features in the hearing aids and how they respond to different environments. Some hearing aid technology is very active and is constantly making changes to the hearing aids many times per minute.
The types of environments that an hearing aid wearer is in throughout the day can change the battery draw amount. If an individual spends a day in a quiet environment, the battery draw would be much less than that of they spent the day in a large crowded environment with a lot of noise. The hearing aids are very active in crowded environments, so thereby expending more battery power to process the sound information.
Bluetooth impacts hearing aid batteries
The fourth factor affecting hearing aid batteries is whether or not the hearing aids have Bluetooth and other wireless connections. The hearing aids that are constantly connected to Bluetooth devices, or are used for phone call/media streaming will require a lot more battery power. The connections and clarity that are gained by the increased technology and also the wireless connections are definitely worth the time spent to change a few extra batteries each year.