Sleep

When the PowerBook is in sleep, it draws enough power
to maintain the information in its memory (including any open
programs and documents). The computer is on, but almost
completely inactive.
Put the computer to sleep to
nconnect it to a PowerBook Duo MiniDock or a PowerBook
Duo Floppy Adapter
nchange the battery
nconserve power during your work breaks

To put the PowerBook to sleep

nIf the computer is on, choose the Sleep command from the
Special menu.
nYou can also put the computer to sleep by closing the display.

Automatic sleep

If you don’t use the computer for several minutes, it goes to sleep
automatically. This conserves battery power. You will notice that if
you spend several minutes reading without using the computer,
or if you take a break, the screen may be dark when you’re ready
to resume working.
To wake the computer, press any key on the keyboard (except
Caps Lock). The desktop reappears looking just the way it did
before the computer went to sleep.
Chapter 1: Setting Up Your PowerBook Duo 13