I got an arena kraton. New 3s 5200 75c lipos, a venom 50 watt balance charger. The batteries took about 15 hours to charge. I didn't know if that was bad or not. I put them in the car. Steering worked but not throttle. Then it took off on its own, smoking shooting embers. Any ideas what the problem was? Did it damage the esc or motor? Any help will be appreciated