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

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.

works well and has saved me a few dollars

It's just what I wanted. Easy to use

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

I have used this for over one month now to test my hearing aid batteries. I wanted to be able to confirm that batteries were indeed exhausted when my hearing aid signaled that the battery was depleted and that batteries that I had stored for a while were still good before using them. What I found was that after my hearing aid had shut down due to exhaustion of the battery this tester still showed it as in the good range. I then tested the same battery with a larger tester that I have and this confirmed that the battery was below usable range. So this tester seems to be inaccurate compared to three other sources: my hearing aid, my phone program for the hearing aid and a separate battery tester.

Like any battery tester, sometimes you get weird readings. Part of that is from the flaky technology in the battery design. If it pegs the meter, you have a good battery. If not, I throw the battery out, because it will soon fail. Ignore directions to the contrary. Nice temporary covered storage for cells. Easy to make sure a cell is good. Costs a little more than it should, but easy to check any size.

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.

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

I should have returned this right away but it languishes on my shelf. If anyone from the company sees this I would appreciated them reaching out. I need something like this for testing my hearing aid batteries and was so disappointed with this.