Took the Exp out this morning, ran for probably an hour non stop, come home, and when I went to leave again it would not start. It tried to crank a few times slowly but now when I turn the key nothing happens. Lights work and do not dim when I turn the key. Turning the key only causes a single click near the passenger foot area. Out of the 10 times I have tried to start it did slowly start to crank once but that has been it. Battery has 12.8 V and no drop in voltage when I try to start it.