I have a 2003 Taurus and last weekend it failed to start. When I tried to start it I heard to clicking everything was just dead. We charged it and it started then I shut it off and it wouldn't start again. So we charged it and let it run for a little longer. Its given me no troubles all week until today, it starts but is extremely hesitant to do so... I don't know if its the battery or starter or maybe something else?