I charged my Nookcolor last night to 100%. I read for about 5 hours and it went down to 38%. The web was off. It seems like it should have lasted longer. Comments
I don't think that is unreasonable. Usually estimates from manufacturers are on the optimistic side. I think the estimate from B&N is 10 hours. I'm sure that is WiFi off, minimum screen brightness, nothing running in the background, who knows, maybe zero page turns. Anyway, I'd say what you are seeing is in that ballpark.