Weird.. Mine I was weary of the same problem.. After the first charge if went down to 93% after only 2 1/2 hours.. I recharged it, and have been monitoring it.. But it is now 4 full days, and at about 95%. Half that time with wifi on, half off.. Being my first Nook it took me a while to figure out that when people were talking about wifi off, it was not THE wifi for the entire house, but there was a way to turn it off on the device..