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Disposable Hearing Aid Batteries 101 | Which Hearing Aid Batteries Are Best?

By: Dr Cliff Olson
May 24, 2018
Video Transcript

The typical size 312 disposable battery will give you approximately 5-7 days of battery life.  While this may seem like it isn't very much, just remember that this tiny battery needs to power a tiny computer that is constantly processing sound.  How do disposable batteries work.  Since Mercury was eliminated from hearing aid batteries, the primary chemical substance is Zinc.  These batteries are often called Zinc-Air batteries because when you remove the sticker/tab from the back of the battery, Air mixes with the Zinc creating an electrical charge.  

This 1.45 volts is strong enough to power your hearing aids.  What will affect battery life?

1. Severity of Hearing Loss

2. Battery Size

3. How many hours you wear it per day

4. Accessories that you use

5. Humidity/Temperature/Altitude

What NOT to do with hearing aid batteries?

1. Don't store in Fridge

2. Don't store batteries loose with other metals or batteries

3. Don't leave them near pets or children

4. Don't eat them!!!

What to look for in a battery?

1. Fresh Batteries - Hearing Aid Clinics are the freshest

2. Pay attention to color - all batteries are color coded based on size

3. Don't just look for Milliamp hours - this is a bad way to evaluate batteries

4. Don't just look for the cheapest battery

5. Try several different battery brands to find which one is best

If you don't want to use disposable batteries, you can convert your existing hearing aids to Silver-Zinc batteries with a Z-Power conversion kit.  Just ask your hearing care provider.

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