Sony PCV-W600G - Manual (Page 28)

VAIO Computer Quick Start
28
To set up the remote control
Insert two AA alkaline batteries (supplied) into the remote control as shown.
Inserting batteries into the remote control
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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.
When your remote control is not being used for extended periods of time, remove the
batteries to avoid possible damage from battery leakage.