Got a run on a full pack tonight. 2 x Turnigy 4s 5000mah 40c-50c yielded about 15 minutes of run time. I have the lipo cutoff set at 3.4v which is higher then i typically do on my 1/8 scale stuff. I ran on the baseball field so traction was a lot better then last night. The power of the castle system does not disappoint. This thing covers some ground man!