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Mines at 10 hours and 2 minutes of usage and 51 hours and 34 minutes of standby.
Haven't charged since I got it Friday, have had it at 100% brightness for the past hour or so just to kill the battery to get a full overnight charge in so it doesn't die on me tomorrow

You forgot to mention how much battery you have left?
 
I think that's one of the killer features of this product. Compared to a full laptop , this tablet last a lot longer I do not know how people get 10 hours of battery life on a surface Pro three or four but I know that my surface pro three only lasted maybe four hours at most. And this sucker can last 12 hours for movies? Official my go to device when I'm traveling.
 
Well right now I am at 85% with 34 hours of standby time and 4 hours of usage. My other tablets would be dead by now..
 
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