I am considering buying the Novel. I have tried to get as much info as possible from the site. A few questions:1: I am concerned about the short battery life, especially for travel. Is the battery replaceable on the fly, or is there an external battery that can be plugged into the AC adapter plug to extend battery time?2: Is the OS located on an SD card? If so,can it be removed and copied, then the replacement used so the original can be replaced if I screw it up?3: I'm more familiar with desktops. Is it possible to just replace the OS with a new Android OS to eliminate all of the compatibility issues I keep reading about?