Dell Wireless Mouse WM324 - Manual (Page 10)

9 Features
Increasing the Battery Life of Your Mouse
The mouse has two operating modes built in to conserve battery power :
1. Sleep mode : The mouse goes into sleep mode when it has been inactive for 5
seconds.
To wake the mouse: Move, click or scroll the tilt wheel.
2. Deep sleep mode : The mouse goes into deep sleep mode when it has been
inactive for 5 minutes.
To wake the mouse: Move or click.