Sony Vaio VGN-AR300 Series User Manual page 65

3 Insert the supplied two AA batteries into the remote commander.
4 Put the battery cover back on the remote commander and slide it in the reverse direction of the arrow illustrated above
until the cover clicks into place.
If the remote commander does not operate properly, you may need to replace the batteries. When the remote commander has not been used for an
extended period of time, remove the batteries to avoid possible damage from battery leakage.
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Using Your VAIO Computer