I apologize if there is already a thread for this. My battery life has been fine but all a sudden the last few days it is draining really fast. It only last until about noon then its dead after being on charger all night and starting the day at 100%. It normally last all day and when I plug it up at night around 8pm or later it has been at 50%. I am not sure how to check and see what the problem is. Thank you for any help!