There is. You can expect 90 minutes to two hours from that battery, depending on the freedom of movement of your steering linkages, and how much steering and braking you do at speed, as that's what drains them, especially braking. That's another advantage of having a radio you can set the servo end points on, as you can then tell the servo to only pull exactly enough to stop the car. The extra effort which the servo needs to try continuously to move past a point which it cannot (full brake lock), causes the current draw to increase exponentially. An RTR (non ball raced steering system, no EPA on radio) can be expected to have significantly shorter receiver pack durations than a lightweight race car with a good radio and ball raced steering throughout. You can counter this somewhat by adjusting your linkage, rather than the endpoint of the servo, but if you do it with a good radio, you can fiddle with it infinitely from the comfort of the radio menu.