I’ve had my Nexus 10 for over a year now (ordered directly from Google).
Not using it a lot these days, So most of the time it’s sitting on the shelf in standby mode (Wifi’s off).
I occasionally take it out, turn on wifi, to show a Youtube video to my parents, or just play a quick game with kids.
With this light use, what amazes me in it is the battery life. Check this out:
With 10% drain over 39 days, you can figure it out to last over a year on a single charge - way more than my good old Samsung Galaxy S2 (which is now 3 days max, but I tend to charge it almost every day).