USB.org has a specification for a protocol to basically implement the Smart Battery Specification over USB, called HID for Power Devices. (See: http://www.usb.org/developers/hidpage/pdcv10.pdf and http://smartbattery.org/specs/sbdata10_a.pdf).
I am wondering if TI has any reference designs that show an implementation of this to the BQ gas guage SMB interface. If so, where can I find the documentation and design files?