If I do not drive my EVO 9 MR every 3 days, my battery drains completely. I recently installed a Sears Gold battery before I left on deployment and asked my wife to start the car once a week. It started fine the first week, but nothing on the second week.

I have a Compustar Pro alarm installed by a dealer in Hawaii that did not give me any problems for 6 months, and I have the stock radio installed right now. Of course now that I think about it, I was driving the car every day in Hawaii, so the alarm could be suspect.

Does anyone have any ideas about what could draw so much to kill the battery in 3 days? Should I isolate the Compustar and see if that is the problem? Thanks for your help.