Your Choices in Hearing Aid Batteries
Hearing aid batteries are a vital part of the hearing aid itself. Without power from the battery, the whole device is essentially useless. They’re so essential that many individuals who have a hearing aid will also buy a hearing aid battery tester. It makes it easy to know when the battery is running low on power. Then they will know to have other batteries on hand to replace it.
The life span of hearing aid batteries will depend on what kind of device you’re using. The smaller hearing aids that fit into the ear canal have a shorter battery life. That’s because the batteries are smaller and contain less of the substances required to produce power.
The older, more traditional kind of hearing aids utilized mercury batteries to keep them going. But there are newer zinc batteries that are much more effective and therefore more commonly used.
Something called zinc air is the secret behind zinc batteries. This is a mixture of oxygen in the air along with the zinc present inside the battery. This produces a reaction that powers the battery. They last approximately twice as long as the old mercury batteries.
Zinc hearing aid batteries come with a color coded tab on them. One purpose for this is to be able to tell what size the battery is. But it also keeps the air out of the battery until it is time to use it.
Once the tab is removed, the oxygen in the air is allowed into the battery. The battery will activate once the zinc and oxygen combine. So it’s important that you don’t pull off the tab before you need to start using the battery. You don’t want it to start losing life before it’s even in use.
There are four common sizes of hearing aid batteries on the market today. Every size of hearing aid has a certain size of battery that fits it. A number 10 battery with a yellow color code is the smallest you can purchase. The blue labels indicate the largest size available, which is 675. The small sizes are most commonly used for the smaller hearing aids that go into the ear canal. The large sizes are used for the behind the ear hearing aids.
The larger sizes are longer lasting since there is room to hold more zinc inside the battery. However, they are a lot more bulky. For some people, it’s more important that their hearing aid is discreet than it is to change the battery less frequently.
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I was recently in the hearing aid store and they were talking about a new type of hearing aid that may never need to have its batteries replaced. Interesting