I am asking because my E revo vxl 1/16 is having a problem with speed. I went out to try and it went fine. Then in the afternoon i went out again with a different battery and it only went half its speed. I tried resetting or changing the sport and racing mode but it went the same speed on sport, race, and practice mode. But the on racing mode the car didn't go backwards as the instructions say. I tried diferent things with the battery but it goes the same speed with all three same batteries. The batteries are fully charged. The esc doesn' beep that something is wrong so I don't know.