After not driving the car for over a week, I drove it last Tues and it started fine. Today - nothing! I hooked it up to a trickle charger that has a "start" option on it. The instructions say to charge for 3 min then try to start it. I did this and nothing happened, then I tried waiting 10 min and still nothing. No lights, not even a slight turnover. What else should I try?