Sony VAIO Digital Studio PCV-RX490TV Quick Start Manual page 32

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Setting up the remote control
Insert two AA batteries (supplied) into the remote control as shown in the
illustration.
Inserting batteries into the remote control
Under normal use, the AA batteries may last up to six months. If your remote control
does not operate properly, the batteries may need to be replaced.
If your remote is not being used for extended periods of time, remove the batteries to
avoid possible damage from battery leakage.
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