To turn your NOOK on, display the touchscreen, awaken your NOOK from sleep, or cause your NOOK to sleep, press the power button for about 1 second and then release it.
To turn your NOOK off, press and hold the power button for about 5 seconds, until the reading screen is white and the touchscreen is dark. Then release the power button.
Power Management
Your NOOK uses quite modest amounts of power compared to a laptop computer. It uses a small amount of power to turn a page on the reading screen, but no power to keep the page displayed. The touchscreen does use power when it is lit. After 72 hours of sleep, your NOOK turns off automatically to conserve battery charge.
To allow you to manage power use, and to give you the experience that suits your reading habits, you can configure two inactivity periods:
•Touchscreen timer: Time from last touchscreen activity until the touchscreen backlight is turned off. You can choose among 10, 30 (the default), and 60 seconds. The touchscreen backlight is dimmed by 50% after half of this time period (5, 15, or 30 seconds). To set the touchscreen timer, tap settings > Display > Touchscreen timer.
•Sleep timer: Time from last activity (touchscreen or button presses) until your NOOK sleeps. During sleep, a screensaver image is displayed on the reading screen and the touchscreen is unlit. You can choose among 2, 5 (the default), 10, 15, and 20 minutes. To set the sleep timer, tap settings > Display > Sleep timer.
Low Charge Alerts
Your NOOK has two
Low charge alert:
When the battery charge is rather low (about 15% charge), your NOOK displays a message to charge it. You can dismiss the message and continue using your NOOK, but you should charge it as soon as possible. To extend the time that the charge lasts, you can turn Airplane mode on, which disables all wireless connectivity. If you turn Airplane mode on, you cannot access your online digital library, The Daily, the Shop, or browse the web.
After your NOOK displays the low charge alert, it might turn off wireless connectivity. When it does, you will not be able to access the your online digital library, The Daily, the Shop, or browse the web until you charge your NOOK.
Critically low charge alert:
NOOK User Guide | Power and Charging | 17 |