I returned another HP re furbished Chromebook because the back gets quite hot (I think over the battery). I just got this one, same as the last one and it has been on just long enough to sign in etc. It is already hot. Very warm, too warm to lay on bare legs if on your lap. I will keep this one and assume this is normal. I had my original one that I had purchased 5 years ago new at walmart. It never got hot, and just died probably from old age. I just hope this is not a bad thing with the HP Chromebooks now.