An 8th grade boy in Rochester, New York made an unexpected discovery while working on his school science project this year.
He found that if he took the sticker tab off of the battery 5 minutes before putting it in the hearing aid, the battery lasted an average of 80% longer.
His study has already earned him several honors, including a US Naval Science Award.
Here’s a video from news coverage of the story:
It’s good news for people who wear hearing aids. The most common size hearing aid batteries (size 312) typically last about 5 – 7 days. That’s a whole 4 – 6 days longer life that you may be able to get from your hearing aid batteries.
(I’ll be running some tests in my office to discover whether or not it works. If you’re on our email list, we’ll let you know about the results once concluded.)
“So, why didn’t we know about this until now?”, you might ask.
Hearing aid battery manufacturers have always recommended removing the stick tab 1 minute before employing the battery in the hearing aid.
I think most audiologists are aware of this and pass on the suggestion to patients.
But, the 8th grader revealed through careful testing that 5 minutes is the optimal amount of time to get the most life out of a battery.
It been deemed the “5 Minute Rule”.
Maybe hearing aid battery manufacturers have never tested the optimal time window.
Maybe they have and they didn’t want us to know because, hey – they just might sell more batteries if they burn out faster.
Only they know for sure.
Here’s a video from Rayovac (hearing aid battery manufacturer) that explains how hearing aid batteries work:
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Have you seen our instructional videos for hearing aid batteries?