I went on a 3 week holiday with my Nook and didn't bring the tiny charger cable, because past experience tells me that it will last for longer on a full charge. Do I regret it or what?
I'm not sure if it's the cold weather that drains the battery quicker than it should. I carry it around in a normal canvas bag during the day, and was reading it 3 hours on average daily (with more on some days during longer train rides). Towards the end of the second week, it was showing 59% which was decent, but the screen froze in the middle of the third week. Turns out the battery was flat, and I was not even reading as frequently (why? blame Amsterdam).
Fortunately I had some books on my iPhone so I was re-reading them, or I'd go crazy.