Sony MDR-IF230RK User Manual

The headphones are powered by a
rechargeable battery NC-AA (HJ)
(supplied) or a dry cell battery (not
supplied).  Charge the rechargeable battery
before use.
NC-AA (HJ) is applicable only for Sony
cordless/wireless headphone systems.
Never use for any other purpose.

Check that the transmitter power is off.

Open the battery charger lid on the
transmitter.

Insert the supplied rechargeable battery
NC-AA (HJ), making sure to match
battery polarity with the 

] and }

marks on the charger case.
The CHARGE indicator then lights up
and charging starts.

Close the battery charger lid on the
transmitter.

Charging time and battery life
About 24 hours is required to fully charge
the rechargeable battery.  Once fully
charged, the battery provides about 30
hours of operation.
One hour charging of the rechargeable
battery enables about 1 hours and 30
minutes of operation.

•This system is designed to charge only the

supplied rechargeable battery for safety.  This
system cannot charge other batteries even if
they have the same shape.

•Since little electric current is used for charging,

there is no need to worry about overcharging.

•As this system is not affected by the memory

effect of the Ni-Cd battery, recharging the
supplied battery before it is completely
discharged is not a problem.

•When the transmitter power is turned on, the

battery charger does not operate.

When to recharge the battery
Recharge the supplied battery when the
POWER indicator on headphones dims,
and hissing or noise occurs.
If the POWER indicator dims even after full
charging, the battery is completely dead.
To purchase a new rechargeable battery,
consult your nearest Sony dealer.