Siemens SP - Manual (Page 9)

8 9
So-called zinc-air batteries are
used today almost exclusively
in hearing instruments to mini-
mize environmental damage.
These batteries require oxygen
for operation, which they ab-
sorb from the air. The battery
is activated as soon as the
protective foil is pulled off and is used up even if you do not
use your hearing instrument.
You should always pull off the protective foil only if you
actually use the battery. Also, do not leave the batteries in
your hearing instruments if you do not use them over a
longer period. The batteries can leak and damage the
instruments. The batteries keep for from a few days up to
several weeks according to the way they are used. You can
recognize when a change of batteries becomes necessary,
because your hearing instru-ments become noticeably quieter
towards the end of the battery’s life. Then it is time for new
batteries. Two warning tones sound once per minute,
indicating that you must insert a new battery.
Handling batteries
Your hearing instrument specialist can switch off the warning
tones if required.
Zinc-air batteries which are almost completely used up show
the following behaviour: After switching on the instruments
they function completely normally, but then rapidly become
quieter. The more the battery is used up, the faster the gain
falls off. You must then replace such batteries by new ones.
3 / 3 P
Battery changing
Removing the battery
Open the battery compartment
as shown in the picture.
It has to opened completely.
In order to do this you have
open the compartment
beyond the first stop (“OFF“–
see: Switching ON / OFF).
Normally the battery drops out
when the battery compartment
is completely open.
Should this not be the case, you
can lightly tap the instrument or
push the battery out with a
pencil as shown in the picture.
Inserting the battery
Important! Make sure to note
the polarity of the battery!
If the battery is inserted incor-
rectly, the battery compartment
can be closed only with con-
siderable force. This will damage
the instrument.
Closing the battery
compartment
Close the battery compartment
by pressing from below with
your finger tip.
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