Got to add something to this. I have a stock Slash and I have two DTX4200 7.2V 4200mAh NiMH batteries. I have ran mine through the grass back and forth hard and ran it across my porch and jumped constantly off the other side.... from 12:11 pm to 1:48pm. Don't know why it is running this long but I am not pushing the truth here either. I thought these things were suppose to get no more than 20min. And yes, it is set on high performance with the throttle set at 70/30. Is this normal?