When I did my LC battery conversion, typical fully charged battery voltage for the LiPO I used measured out at 12.3V. This allowed all normal LC functions to work. After some run time, voltage would dip down to 11.7V, but all functions were still intact. I'm not surprised that some LC functions would not work at 9.6V. One of the things I have learned is that when space for a battery is at a real premium, stay with the higher voltage and go with a reduced capacity.