Audiologist Choice Hearing Aid Activair Battery Tester with Separate Size Slots for Each Type of Battery

This is very easy and functional device to use. I strongly recommend this product. Four different batteries sizes can be tested.

I had purchased another battery checker. And at first I thought it worked well. But after a couple of days it quit working. This one is easy to use and easy to read the results.

Great for hearing aid batteries. I find alot of our hearing aid batteries are bad right out of the package. And that was the problem with my hearing aids. Bad batteries!

I use this to help my students tell if their hearing aid battery is good or not. There are electronic versions of this as well, but this one never needs batteries of its own or needs to be charged. It's simple and easy to use. My students like watching the needle move when they put their battery in. A bonus is they incidentally learn what size battery they need just by virtue of choosing the correct slot to insert their battery into. Incidental learning sticks around in their memory a lot better than direct teaching. This is cheap, easy and accurate to use, and never runs out of power - a win all around.

It does not work. Dead batteries test out as perfect!

Just slide the battery in and press the top of the case and the reading is instant and clear. This is much better than the battery testers that also take the larger sizes. Such testers are great for the larger batteries but, beacuse they drain too much current for the little hearing aid batteries, their readings last lnoy a short, short part of a second before they pass into the Not Good zone.

Works but doesn't go all the way to the right in the green area when testing a new battery. Just barely gets into the green section indicating that there isn't much time left before it goes bad.

A good reliable source if you’re doubting the power of your batteries