HI all!! My roommate got an 09 Cooper S. Every now and then it won't start.. Just clicks a **** load of times. Sometimes it will give a half second Crank, but still won't start. We live in Florida. Had the battery checked by autozone and it was perfect. I don't know anything about this car. Like I said, it's intermittent.. Started fine yesterday. Started fine this morning. Now nothing. Hooked up a battery charger to it also, nothing..

can someone help please?