If you just leave your Kobo "ON" like before it remains on. EDIT: Sorry this is wrong it will go to sleep.
If you tap the power button it will got to "SLEEP" which locks the buttons but provides instant on.
The unit will stay in "SLEEP" mode for a maximum of 15 min before shutting down completely.
Last edited by Turt99; 07-02-2010 at 03:45 PM.