Actually I might face that situation. Since I am planning on desinging a rover that has to overcome inclined surfaces and since rover has a aliminium body I reckon the total rover could be around 40-50 kg. So not sure if anything would stop all 4 wheels at the same time but I was trying to make the calculations on the most unexpected case. What configiration of lipo would you reccomend. I am now considering using 5 lipo's. 4 with very high c ratings and lover capacity and 1 for microcontroller and other components on the rover.