Power issues have been bothering us for quite some time. We were earlier using 4*1.2V batteries to power PandaBoard and mbed and 8*1.2 V for Kinect. This had made the design quite bulky and was taking unnecessary space. Thus, we decided to reduce the size by replacing these cells with 2000mAh, 3 cell LiPo battery which gives 11.1V. The pic above shows the integrated LiPo batteries in the belt.
Further, we have implemented the Power Cut Off Circuit to prevent 3 cell LiPo batteries from damaging whenever voltage drops below 9V.
We have built the voltage cut off circuit using details given in RC forum
The pic shows the implemented circuit.