How can I replace the battery in a Dell XPS 10 tablet?

My Dell XPS 10 tablet will only stay on when plugged in. Prior to my issue, the battery would last for upwards of 7 hours. After leaving it off for 36 hours (and still plugged in to the dock) during an international flight, it's now telling me no battery is detected. I can only have it on while plugged in to either the charger or the dock. I can't seem to find any instructions on how to open the tablet. I want to make sure the battery is seated properly, and if so, replace it. Any help would be appreciated. Thank you.