The SRM for the C4 BeagleBoard lists the part number of the RTC backup
battery, and the position it occupies on the board is clearly marked.
Looking at photos of the xM board, it would appear to have space for a
battery, but of a different size and design. Does anyone know what
model this battery should be, so I can add it to my order for the xM
board, or do we need to wait for the SRM to be released first?