The matter of Batteries supplying
The RONDO Hearing Aid is powered electrically
by a built-in Lithium Battery Type CR2032, available everywhere as
being used universally in many common devices (cameras, camcorders,
clocks, timers, etc.) The expected operation time is approx. 200 hours,
meaning an average use of 3 weeks, and an estimated battery cost of
60 $ per year for a pair of RONDOs, much lower than the battery costs
for digital H.-A.
Another decisive characteristic of the Lithium battery is its extraordinary
long life (10 years) when not used, on the contrary of the "zinc-air"
battery type supplying all the digital H.-A. and which suffers from
a fast (some weeks) self-discharge once energized.
With the possibility of replacing the CR2032 Lithium battery by a
compatible special Lithium rechargeable accumulator permanently installed
in the RONDO for a couple of years, the battery costs decreases drastically
to less than a few $ per year, with the real advantages having no
more the worry of replacing batteries!
The OTOFILL is the charger for RONDO Hearing
Aids. It can be connected to the line voltage (90-240VAC 50-60Hz)
through an universal external power supply (2) or to the optional
battery pack OTOBATT (3).
The RONDO operates correctly from 4 down
to 1,8 Volts of the battery, which means a complete discharge. The
gain is steady (+/- 0,5 dB), but the max. sound output decreases :
this means that very loud sounds which are correctly compressed/limited
down to 2,6 Volts, are more and more clipped by lower battery voltage,
which is of no importance for average sound levels like by normal
talk. This " clipping " is a sign of the " end "
of the battery, but with anyway many more hours reserve. With the
accumulator, this will be even better, as when you recharge overnight,
the voltage is always high, for permanent perfect acoustical performances.
One must be aware that the capacity of the accumulator (65 mAh) is
lower than that of the battery (230 mAh) so that it may give some
50 hours operation with a full charge (contra some 200 hours with
the battery) We advise to recharge every night (a few hours are sufficient)
for obtaining the maximum number of cycles of the accumulator (possibly
400 to 1200, = 1 to 3 years) The replacement against a new accumulator
is exactly so simple as the simple battery exchange. Don't recharge
if a CR2032 battery is installed in the RONDO!
OTOFILL & Supply Specifications:
Size : 72 x 50 x 30 mm
Electrical Adapter : supply input: 90 to 240 VAC, Output: 6
Average charge time : a few hours, as long as the ML2032 is
discharged. For example after one day (12 hours) use of the RONDOs.
OTOFILL with RONDOs