Sony VGN-A600B - Manual (Page 27)

About the Wireless Mouse
27
To set up the wireless mouse
Insert two AA batteries (supplied with the mouse) into the wireless mouse as
shown.
Inserting Batteries into the Wireless Mouse
✍
If your wireless mouse does not operate properly, the batteries may need to be
replaced. When your wireless mouse is not being used for extended periods of time,
remove the batteries to avoid possible damage from battery leakage.