User's Manual

nook User Guide Power and Charging 17

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.

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 o. 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).

• 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.

Low Charge Alerts

Your NOOK has two low-charge alerts:

• Low charge alert: When the battery charge is rather low (about 20% 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. 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 o 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: When the battery charge is critically low (too low for continued

operation), your

NOOK displays a message to charge it and shuts down. The critically low

battery level is about 5%.

You must charge your

NOOK before using it. It will charge faster using the power adapter. When

your

NOOK has enough charge to run, it will start, but remember that it still has very little

charge. You can use it, but should continue charging it.

Battery Charge and Charging Indicators

Your NOOK ships with a partially charged battery. We recommend that you charge your NOOK

before using it.