Duracell No. 10 Zinc-Air Hearing Aid Battery
The Duracell No. 10 1.4 volt zinc-air hearing aid battery is pictured
at the right.
The No. 10 hearing aid battery came out by 1987 with
the advent of ever smaller behind-the-ear (BTE) and in-the-ear (ITE) and
completely-in-the-canal (CIC) hearing aids.
No. 10 batteries were always zinc-air batteries, as zinc-air
batteries began replacing existing mercury batteries in the late 1970s
and early 1980s. Mercury batteries are no longer sold today because of the mercury in them and the consequent environmental concerns.
The No. 10 zinc-air battery measured 0.225" in diameter
by 0.137" thick. |
 |
Click picture for larger view |
| |
 
|
|
|
The bottom (positive end) of the No. 10 battery. Note the tiny air hole
in the center of the "+". A yellow tab seals this hole keeping the air
out until the battery is ready to be used. By doing this, zinc-air
batteries have a long shelf life. When the tab is removed, the battery
starts "working" and even if you don't use it, in a few weeks it will be
dead.
|
 |
Click picture for larger view |
| |
|
|
The Duracell zinc-air batteries typically came either 4 or 8
batteries to a pack. This is an 8-pack. Notice that No. 10 batteries
have yellow tabs on them, making it easy to identify them.
|
 |
Click picture for larger view |
| |
|
|
Top view of the No. 10 zinc-air hearing aid battery showing its size.
(Each mark on the ruler is 1/16".) |
 |
Click picture for larger view |
| |
|
|
Relative size of the five sizes of zinc-air hearing aid batteries as
seen from the top. From left to right they are battery numbers 5, 10,
312, 13 and 675. |
 |
Click picture for larger view |
| |
|
|
A three-quarter view of the 5 zinc-air hearing aid batteries showing
their relative size. From left to right they are battery numbers 5, 10,
312, 13 and 675. |
 |
Click picture for larger view |
| |
|
|
Side view of the 5 zinc-air hearing aid batteries showing their
differences in height. From left to right they are battery numbers 5,
10, 312, 13 and 675. |
 |
Click picture for larger view |
| |
|
|
Bottom view of the 5 sizes of zinc-air batteries showing the
color-coded tabs that seal the air holes before they are used. From left
to right they are battery numbers 5 (red tab), 10 (yellow tab), 312
(brown tab), 13 (orange tab) and 675 (blue tab).
|
 |
Click picture for larger view |
| |
|
(If a larger picture doesn't appear, you may have to
turn your pop-up blocker off)
|
|
|
