Sennheiser infrared IS 380 Instructions For Use Manual page 11

RECHARGING THE ACCUPACKS
For recharging, insert the BA 151 accupack into one of the two charging
compartments . If you have a second accupack (available as an accessory),
you can charge it in the second compartment.
When the accupack is going flat (you can hear hissing noise and slight sound
distortions), switch the headphone receiver off and recharge the accupack.
Recharge a flat accupack immediately. If it remains in the headphone
receiver and the receiver is then (or remains) switched on, the accupack
will be damaged.
If possible, use the entire capacity of the accupack. Short discharging/
recharging cycles will reduce its capacity.
N.B.: Before using the accupack for the first time,
it MUST be charged for 24 hours!
NOTE
Charging in the charging compartments
mitter is switched off ("TSP") as long as it remains connected to the mains!
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works even when the trans-
RECHARGEABLE ACCUPACKS HAVE A "CHARGING CYCLE"
Depending on how long your receiver has been in use, you must also recharge
the BA 151 accupack for a certain time. A simple rule of thumb will help you to
decide what time is necessary:
Operating time x 3 = recharging time
Example:
1 hour listening 2 hours listening
3 hours recharging 6 hours recharging
OPERATION WITH A SECOND ACCUPACK
By using a second accupack, you can increase the listening time with your receiver.
The second accupack is always inserted in the charging compartment
transmitter to ensure that it is ready and fully charged when it is needed.
If you use your system with only one accupack, you must stop after
about 4 hours and recharge the accupack for about 12 hours in the
charging compartment of the transmitter.
Listen
Recharge
1 2 3 4 5 6
With a second accupack, you can listen for more than twice the time.
Simply place the discharged first accupack back into the charging compartment.
After the (partial) recharge, there is an additional (partial) amount of power
available:
Listen
2
Listen Recharge
1
1 2 3 4 5 6
3 hours listening
9 hours recharging
7 8 9 10 11 12 13 14 15 16 ...
Listen
7 8 9 10 11 12 13 14 15 16 ...
of the
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