I wonder if the battery on top is effecting the gyro ?? Will it fit on the bottom ? Just my opinion ,,, but I believe there's a point " 700-750mah battery" of where a larger battery isn't a good thing. There's a lot more strain on the entire prop system, especially with the X5 only having nylon bushings in a plastic housing. The other thought is that the light duty brushed motors can over heat with that long a run time. I personally find 7-8 min is plenty and I need a break also ,, Not a big deal to swap out batteries.