Battery Dies every 2 years!!!

[ddiorio1313]

I have had my 1997 318ti for 6 years now, and I have to replace the battery every 2 years! The first time it was the BMW battery and I thought it was the alternator because I just bought the car, but it was the battery. The second time I took my car to have it looked over for winter and the battery wasn't holding a low level charge. So my mechanic swithed the battery over from BMW brand to interstate. 2 years later I took it in for a winter inspection and sure enough the battery wasn't holding a low level charge, so I had it replaced with another interstate battery.

This morning I went to go to work and the car cranks but won't turn over, and the battery light was on, and I just had started it the night before.. What is the deal...could the battery be dead again! 2 years on a battery is nothing! So, I am starting to wonder if there is something else wrong that is draining my battery... I don't have any after market stereo stuff in my car so it isn't that.

Any ideas would be great, or if you need any more details from me let me know....