I am sure you can devise a way to get it to work, just takes imagination. I don't own the lipo you are referring to but I have one on the way. As is though the X5 will not take the cell on that side of the chassis without some kind of modification. As long as you can devise a secure way of mounting it so it will stay put, I am sure it will work. Due to the fact that you will have equal battery weight on both sides of the chassis after this, you will probably want to add some weight to the 4-cell side to balance the chassis out again!