Mio A501 - Manual (Page 27)

Getting Started
1-11
NOTE:
To avoid accidental operations after waking up the device from the suspend mode,
you can enable the auto-lock function by tapping Settings System
Power Advanced and selecting Auto lock when device turns off ok.
The device will not enter the suspend mode when using the navigation program (for
selected models only). In such cases, the device’s standby time will decrease
without using external power. Therefore, you are advised to exit the navigation
program properly when the program is not needed any more.
Turning Off
If you are not using the device, press and hold the Power button ( ) for 3
seconds to turn the device off.