I have got 2004 model mustang GT. It has incredible music system with 1800 watt hooked up to 2 sub woofers. And the battery lights always keep flashing on and off. So I need really good batteries for my car to support all this. So can somebody help me with some good quality car batteries which are long lasting, from which I can choose for my own car? I would really appreciate your replies regarding this. Thanks.