Just bought a brand new Rustler VXL and noticed that after running car mildly, the VXL-3s is blinking red. ( pulse every 1.5 sec) The battery is a brand new 4200 NiMh 7.2V I am able to run the car for approx 30 min. Car seems to be running good with no loss of power until battery is finally dead after 30 min. Motor doesn't seem to be too hot. Any help / explanation would be appreciated.