The battery is a yellow top that was installed a little over a year ago. Absolutely to rattling, smoking, sounding of any kind. The car does have a small oil leak that p ipe has had for as long as I have cocrete it. I never even checked because honestly it never bothered me. It may be something simple. This is by far the best one I have had. The GT model has a lot of upgrades from a standard model including power everything, bigger engine concrete pipe design manual pdf 1.