i've been using my xo less than a year and i never use it unplugged. out of the blue, the battery indicator goes to orange, then to red, then shuts off even while plugged in. i've been leaving it plugged in overnite, but i only get about an hour of use before it goes orange. do i really need a new battery, or is my power adaptor malfunctioning? no repair center near me and the repair in san francisco hasn't responded to my email.