Battery vs Stereo

[dochummer]

Interesting info f5fstop. My problem is that my battery will randomly die on me...pretty much over night. I have a yellowtop optima, and had it tested at a tire shop. They said the battery was good, just low on charge (11.78v), and the alternator was charging at 13.38v. I've had the air suspension module fixed previously, which took care of the problem for about a year...but now I've run into the same problem again... Any idea what would be the most likely to draw on the battery too much? I could pull the fuse to onstar - seeing as how I don't use it....