Dr. Gene McHugh
Mountain Time USA
9:00 AM-5:00 PM
© Copyright 2021
REGULAR (DISPOSABLE) HEARING AID BATTERIES
Prices, sizes, and capacity variables
affecting use and materials, and warnings
hearing aids require disposable battery cells to operate while an
increasing number are
means when the battery dies, you throw it out. Hearing aid
batteries are environmentally safe
Prices: Our batteries come
six to a pack and cost $2.00, no tax.
batteries come in four sizes - 675, 13,
312, and 10* with 675 being the largest and 10 the
smallest. Over the last 30 years, all hearing aids (world
been designed to conform to these four sizes.*
* The 675 battery while still available
is being used less in newer hearing aids
Many companies manufacture hearing aids batteries including
Rayovac, Duracell, Eveready, and Varta to mention a few.
All use the same color coding system to differentiate the four
sizes of batteries:
Regardless of which brand you buy, you can find the battery size
you need by knowing which COLOR you have.
*There exists one size smaller (5), that has not been
very popular due to the extremely limited battery life.
Capacity at 1.0mAh
Behind the ear (BTE) style hearing aids usually take either a
675 or 13, since they are larger. In-the-ear (ITE) usually
take a 13 size; in-the-canal (ITC) the 312 size and
completely-in-canal (CIC) the 10 size.
Each hearing aid battery cell comes with a certain amount of
battery life, referred to capacity. The larger the
battery size, the higher the capacity when tested at the same
current drain of 1.0 milli-amperes per hour (mAh).
In the table above, notice the hours of battery life under each
battery size. This represents the number of hours a
typical battery would last if the hearing aid's current drain
were exactly 1.0 milli-amperes. While hearing aid
batteries may look like watch batteries, batteries for hearing
aids do not last very long at all when compared to watch
batteries due to the unusually high current drain
So the answer to the question, "HOW
MANY DAYS WILL MY HEARING AID BATTERY LAST?" is primarily
dependent upon what battery SIZE you take and the CURRENT DRAIN
of your hearing aid.
Variables affecting use:
Typically, the "current drain" is noted on the specification sheet for
each hearing aid. You might have to ask your audiologist for that
information. Smaller, lower gain hearing aids tend to have lower
current drain, typically between 1.0 - 1.5 milliamperes per hour (mAh).
Very strong, high powered BTE's might drain at 3.0 -5.0 mAh.
let's try a calculation. If the drain on a 13 battery were 1.5mAh,
how many hours of life would you get? Let's figure it out.
You would divide 290 hours (shown above for 13 batteries) by 1.5mAh (the current drain). As such, battery life should be
around 193 hours.
how many days is that? That depends upon the average number of
hours you use your hearing aid each day. Most people wear their hearing
aids approximately 10-12 hours per day. In the example above, that
would be 16-19 days. However, if you use the hearing aid(s) only
five hours per day, you should more days, right?
there other variables? Yes, a few. Other variables
affecting battery life include:
the level of volume and/or level of input noise; but this is
only true for high-gain instruments.
Altitude, due to the
catalyst being "air" as described below. This is not often
a problem for most people in the U.S., but is a problem
for those of us in Colorado who live at 5000 feet and above.
Patients report getting an extra one or two days when traveling
to low altitude areas. This is the reason.
Materials. Hearing aid battery cells are called
"zinc-air" as it relates to
its material contents. This is why you often see an "A" following
the number, such as 675A or 13A, etc. The "A"
stands for "air activated."
Batteries have a positive (+) and negative (-) side and
must be inserted into the hearing aid's battery compartment correctly.
Hearing aid batteries are mercury-free
which is good for the environment.
Starting the battery. The
air catalyst is activated by removing a
protective seal covering two holes on the battery (shown on the
picture). Once the holes are exposed, the battery begins
discharging. Battery suppliers recommending waiting one minute to
fully activate the battery, but our experience suggests the
battery starts functioning right away. After the battery dies, just throw it away. It
is environmentally safe.
However, if a battery is swallowed accidentally, it may cause a
toxic reaction. In such a case, immediately contact your physician
to determine the best method to extricate the battery. And be sure
to keep batteries away from pets, children or persons with abnormal
cognitive function (e.g., Alzheimer's syndrome, developmental delays,