Duracell No. 630 HP Zinc-Air Hearing Aid Battery
The Duracell No. 630 HP 1.4 volt zinc-air hearing aid battery was
manufactured by Duracell Inc. of Bethel CT. from the 1950s through to at
least 1990.
This battery measured 0.61" dia. x 0.235" thick (1.55 x 0.6 cm) and
weighed 0.1 oz (2 grams).
Before 1977 the No. 630 batteries were mercury batteries. Then, in 1977, in order to keep toxic mercury out of the environment,
zinc-air batteries began replacing the existing mercury batteries. Mercury batteries are no longer sold today because of their
high mercury content. |
 |
Click picture for larger view |
| |
|
| |
|
|
Bottom view of the Duracell No. 630 HP zinc-air battery. The "+"
indicates the positive terminal. The "HP" presumably stands for "High
Power".
Note the four tiny air holes
(one just below the "IN", below the "+", and at 3 and 9
o'clock).
|
 |
Click picture for larger view |
| |
|
|
Bottom view of the Duracell No 630 HP zinc-air hearing aid battery
showing the reddish-colored tab covering the 4 tiny air holes.
A red tab sealed these air holes keeping the air
out until the battery was ready to be used. By doing this, zinc-air
batteries had a long shelf life.
You pulled the tab off when you were ready to use the battery. When
you removed the tab, the battery
started "working" and even if you didn't use it, in a few weeks it
would be
dead. |
 |
Click picture for larger view |
| |
|
|
Side view of the Duracell No 630 HP zinc-air hearing aid battery. The
negative terminal is the top and the outside and bottom is the positive
terminal.
|
 |
Click picture for larger view |
| |
|
|
Top view of the Duracell No 630 HP zinc-air hearing aid battery showing
the negative terminal.
|
 |
Click picture for larger view |
| |
|
Front view of an Activair battery pak of Duracell No 630 HP zinc-air
hearing aid batteries. As you needed a new battery you just tore a
single pak off along the perforated line. This pak has 3 batteries left.
|
 |
Click picture for larger view |
| |
|
|
Bottom view of a single Activair Duracell No 630 HP zinc-air hearing
aid battery pak showing the "Caution" printed there as well as the
manufacturer's contact information.
|
 |
Click picture for larger view |
| |
|
(If a larger picture doesn't appear, you may have to
turn your pop-up blocker off)
|
|
|
