Ok so this is the second time this has happened to me. I go on vacation for 2-3 weeks and I come back to a dead battery. The first time I left my radar plugged in, and the second time nothing was left on. I have the shaker system installed in the car as well as the guidepoint system similar to lowjack. I've left the car for three weeks three times and the first time I left came back and the car was fine. The past two times dead. The only thing that had changed was installing the a pulley and tune but that shouldn't be causing it. Anyone experience this? I've read in some other forums that the Shaker system actually stays on after turning the car off but not sure.