Rechargeable batteries have a limited number of charge cycles and may eventually need to be replaced. After a period of time that will vary depending on use, you may find that your battery requires you to charge more frequently after shorter periods of time. The battery is recharged when installed in the nook and the nook is connected to a power source, either an AC-outlet or your computer via the USB cable. This replacement battery is an identical back-up to the original battery that came with your nook. There is no need for a service center or to send your nook anywhere to replace with this battery, as it's user-replaceable with the aid of a small Philips screwdriver, included with the replacement battery.
* Battery type: Rechargeable lithium polymer
* For use in nook eReader devices by Barnes & Noble
* Battery life: approximately 10 days on a single charge with wireless/music off; 2 days with wireless/music on
* Instructions enclosed
* Mini Philips screwdriver included