if you leave your car in stop start mode .I had a terrible journey the other day when they shut a major road.if I had left my car in stop and start mode.the time it took to go thro this hold up I would have needed a new battery plus starter motor.is this a gimmick or what because what a start takes out of your battery is the biggest. plus your starter motor is working overtime.i knock this gadget of as soon as I get in the car.
