Sony VPCL13 - Manual (Page 37)

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Using Your VAIO Computer >
Using the Mouse
Using the Mouse
A wireless mouse is supplied with your computer.
The wireless mouse has no cables to plug in and uses a light-emitting diode (LED) instead of a ball.
Using the Wireless Mouse
One AA alkaline battery is supplied with your wireless mouse. Before attempting to use the wireless mouse, remove the
battery compartment cover (1) from the bottom of the wireless mouse and install the supplied AA battery (2) into the battery
compartment.
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If the wireless mouse does not operate properly, the battery may need to be replaced. If you do not intend to use the wireless mouse for an extended
period of time, remove the battery to avoid possible damage from battery leakage.