Related Help Pages: Hearing aids Batteries Accessories

Ambient Conditions and Battery Performance

I will answer the question on the effects of temperature and humidity based on what happens when the battery is being used, not on the effects during storage. A hearing aid battery has a given operating voltage (e.g. 1.25 volts) and it is made to function until the voltage drops below its endpoint (e.g. 1.1 volts). The operating voltage of the battery changes with temperature. As the temperature gets lower the battery voltage gets lower. As the temperature gets higher the operating voltage gets higher. Therefore service life will suffer as the temperature approaches 0 and actually improve as the temperature approaches 40. This is because in the colder environment the operating voltage is closer to its endpoint and so it will run for a shorter period of time before it reaches the endpoint. The warmer environment has the opposite effect. Because the hearing aid is worn close to the body, the actual operating temperature is different from that of the ambient environment thus moderating the effects of temperature.

The zinc air hearing aid battery air holes allow the battery to interact with the environment. If the humidity is low the battery loses moisture. If the humidity stays low for a prolonged period of time it will lower the typical service life of the battery because of dry out. If the humidity is high the battery takes up moisture which fills up the internal space allotted for cell discharge, which results in a shortened service life. The overall effect of service life depends on many factors such as time and how high or low humidity is.

I cannot answer the question concerning pollution.

The simplest way to create a discharge curve is to attach a resister in series with the battery. For instance, we would take a 13 size battery and attach a 1500 ohm resistor in series to it. We then read the voltage on the battery every hour until it reaches 0.9 volts (over 300 hours later).

For more information on Rayovac, visit www.rayovac.com

Take our online Hearing Check

Preferred professionals near you

Fauquier ENT Consultants
550 Hospital Dr
Warrenton, VA 20186

View Details

Audiology and Hearing Aid Center
7340 Heritage Village Plz Ste 101
Gainesville, VA 20155

View Details

Ear Nose And Throat Associates
7001 Heritage Village Plz Ste 260
Gainesville, VA 20155

View Details

Leesburg Family Hearing
211 Gibson St NW Ste 202
Leesburg, VA 20176

View Details

Search for a professional

The Healthy Hearing Report

Hear even the softest sounds (ad for Alta 2)
Need Help?

Need Help?

We have more hearing clinic reviews than any other site!