Shame on you for leaving your X30 in the drawer with no food or human interaction!
The backup battery won't charge until the main battery is finished. Make sure your main battery is charged then wait a little longer for the backup to finish. If it doesn't, you can replace the battery but it involves taking the unit apart.
Aximsite has a
photo tutorial on replacing the X3's backup battery. The process is the same for the X30.
