Would you guys think the neu 5s 4900's would be a good batt. choice for a CRT truggy w/neu 1515 2.5d/MMM ....basically just for track racing ....or would the 5000's be a better choice ??...will i notice the difference of 100 mah??...any idea on a ballpark run time on 4900's ??...thanks guys for the help