What is everyone's experience with the n810's battery life. I can't quite figure out the 'rules' to follow, other than its not laptop so close things down if you are not using them. Duh, I know, but I am a multitask ninja on OSX, its bad.

It seems there have been a few times I was suprised at how quickly it drained, but I couldn't track it down to one thing. Any tips?