My wife's Santa Fe, 2002, 6 Cyl 4wd has strted to show starting problems. The other day we went to the drive-in movies. The vehicle was not running, and she had to use electrical accessories at times for our baby, including a bottle warmer. When leaving, the vehicle would not start. It demonstrated all the classic low battery signs, slow crank, clicking and such. After a bit of swearing and "now what do we do's" It slowly cranked and started. Now, today, my wife got in, started just fine. Drove to the mall. Left the mall , again started fine. Drove to post office.... with AC cranked, and a bit of traffic delays, a lot of stop and go, gets to the post office, goes in and comes out. Tries to start truck..... dead... real slow crank, click..... she swears, calls me, and while talking to me it starts. I suspect the battery. the electrical loads should not hurt a healthy battery. I figure it was borderline. Whith the loads both at the movies, and the stop and go driving with AC cranked would pull more juice than the alternator could provide during these conditions. As such I plan on replacing the battery. No my actual questions: This is 2 year old vehicle with the factory battery. Can the battery be bad already? And... this vehicle is "hyundai certified".. did the people going over it miss the possible weak battery... we've had the truck only 2 months. Any input folks? Thanks!