Wow, I just did a search on this problem. Seems The folks at Nook might know this problem exists. It's the battery. Seems an easy fix is to take the back off, expose the battery fold a small piece of card stock in half, place on top of battery. Put nook back together and your good to go.This tells me the battery is too small. The hardest part is getting the courage to take my nook apart I see a Kindle in my future.