All NOOK Devices sold by Barnes and Noble contain a Lithium-ion or Lithium-polymer battery. The rechargeable battery in the NOOK is not user-replaceable and is not sold as a replaceable accessory.
Helpful Hint: We recommend that you charge your NOOK to 100% before first use to optimize your battery performance.
Turning On and Off
To turn your NOOK on, simply press the power button for 2-5 seconds. Depending on which NOOK you are using, the power button is located on the top edge or the upper part of one of the side edges of your device.
When your NOOK is turned on, pressing the power button for 2-5 seconds will open a window that will prompt you to turn your NOOK off. To turn your NOOK off, select the Power Off option from this menu.
To charge your NOOK via a wall outlet, simply connect your NOOK AC Wall Adapter to your USB Cable, and your USB cable to your NOOK. This is the preferred charging method for our LCD Tablet devices, such as the NOOK 10” HD Tablet designed with Lenovo, as well as our eInk Readers, such as the NOOK GlowLight 4.
Using the USB Cable that comes with your NOOK, you can charge your device from the USB port of a desktop or laptop computer.
Please note that for some NOOK Devices, particularly our NOOK 10” HD Tablet designed with Lenovo, will be a significantly slower charging method. eInk Readers, like the NOOK GlowLight 4, can charge via USB without significant delays in obtaining a full charge.
You can see how much power remains in your battery by checking the battery icon in the status bar.
If you turn on your NOOK when its battery charge is almost depleted, a warning appears on the screen, suggesting that you begin charging your NOOK before trying to use it.
If the battery is depleted, your NOOK will shut down until it has been sufficiently recharged.
Using Alternate Chargers
Each NOOK Device is sold with a compatible charging cable, and many come with an AC Wall Outlet Adapter. While other cables may fit the charging ports for your NOOK Device, we recommend only using the NOOK-branded charging kit that was included in the box with device. For some NOOK Devices, the NOOK-branded charging kits can be used interchangeably, such as NOOK GlowLight 3 and NOOK GlowLight 4.
Maximizing Battery Life
There several ways to maximize the life and longevity of your NOOK's battery.
- When you are not actively using it, turn off your device's Wi-Fi and/or Bluetooth to stop your NOOK from searching for available connections either by turning those settings off individually or by setting your NOOK to Airplane Mode
2. Ensure that you keep your software up to date to optimize performance
3. Reduce your screen and backlight brightness levels and limit the timers for automatically dimming the screen on your NOOK
4. Avoid fully discharging the battery down to 0%. You can charge your NOOK after using it for an extended period of time, or when the low battery alert shows up, usually around 20% battery remaining.
4. On Tablet devices, limit the amount of apps running in the background
5. If you are not going to use your NOOK for a prolonged period of time, such as several days, turn your NOOK off instead of leaving it in Sleep mode
6. Charge the battery halfway before storing your NOOK for a week or more. If you are not going to use your NOOK for more than 30 days, charge the battery to 40%-50% and then turn off your NOOK
7. Avoid using, storing, or charging your NOOK in extreme hot or cold temperatures
8. If you are using your NOOK near an electrical outlet, you can use the device while it is charging
These are recommendations, but overall battery performance will be dependent on your personal device usage habits, such as how long you use your NOOK for, what you are doing on your NOOK (reading, apps, video, etc.), and how frequently you charge the battery. There is a possibility that the NOOK’s battery may drain faster if your NOOK has a hardware issue.