For those of you reading this who wear hearing aids, keeping a stash of hearing aid batteries on hand is more of a necessity than just a good idea. If you rely on the device to go about your day, then by extension, you rely on the batteries. The problem is that little things are just too darn expensive to throw away when you think they might have gone bad.
The worst part is you can’t tell just by looking at them, and it takes far too long to manually check each one – and when you remove that little tab, the life on many of those batteries will start ticking. Actually, this is a point that must be addressed to understand why a hearing aid battery tester is so valuable.
The little tab that you find on most forms of button batteries, including virtually all hearing aid batteries, is there for a very specific reason. You see, many different types of hearing aid batteries are considered “air” batteries, such as zinc-air batteries. The reason they’re called air batteries is that they’re powered by air – sort of.
Zinc-air batteries, for example, contain zinc within the cell. Zinc is reactive with air, so when you pull the tab off the battery, you expose the cell to air, which will enable the reaction. Once the tab is removed, the battery will slowly “run out” of energy until it dies. This is why you must always keep the tabs on your batteries until you are ready to insert them into your hearing aid.
However, if you’ve ever accidentally removed that tab from a battery, that doesn’t mean you should throw it away. It should still have a lot of life left in it for quite a while. Either use it right away or store it somewhere safe and use a hearing aid battery tester with it before you need it. That way, you’ll know if enough charge remains in it to power your hearing aids.
Testers for hearing aid batteries are also extremely affordable, small and portable, and easy to use. Having one on hand and saving yourself the use of a few hearing aid batteries over the months and years you use it will cause it to pay for itself. Just like a multimeter for testing a car battery, a tester for hearing aid batteries is an extremely useful tool.
Keep one in the same drawer where you keep your hearing aid batteries and your other hearing care accessories or clip it to your keyring. There are many easy-to-use, extremely cost-effective solutions out there, such as the testers you’ll find at LocalBattery.com.
Local Battery, operating from the website listed above, also sells a large range of hearing aid batteries (including size 312 hearing aid batteries) at excellent prices, in addition to testers. These batteries are expensive, so if you can get them at a good deal and then keep a tester on hand to make sure you never lose one that works, you’ll save yourself a bit.