Don’t Overlook the Importance of Hearing Aid Batteries
Hearing aid batteries are a vital part of the hearing aid itself. None of the electronic parts will work without being powered by the battery. In fact, they’re so important that a lot of people who wear a hearing aid keep a hearing aid battery tester handy. That way they can tell when the battery is beginning to run out of power. Then they can be prepared with spare batteries when it needs to be replaced.
The life span of hearing aid batteries will depend on what kind of device you’re using. The batteries for those small hearing aids that go inside the ear canal don’t last as long. That’s because the batteries are smaller and contain less of the substances required to produce power.
Older styles of hearing aid batteries used mercury to power the device. 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 combination of the zinc contained inside the battery along with oxygen present outside the battery. This produces a reaction that powers the battery. They last approximately twice as long as the old mercury batteries.
You’ll find that zinc hearing aid batteries have a color coded tab. One of the reasons for this is so you can know the size of the battery. But it also keeps the air out of the battery until it is time to use it.
As soon as the tab is pulled off, oxygen starts to enter the battery. As the oxygen combines with the zinc, the battery becomes activated. 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. Digital hearing aids that fit inside the ear canal typically use the smaller sizes. The behind the ear devices will use the larger sized batteries. You can buy hearing aid batteries just about anywhere where they sell hearing aids online.
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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