General Motors is the first North American automotive original equipment manufacturer to integrate the Continental ultracapacitor-based voltage stabilization as part of the enhanced start-stop system, which lowers fuel costs, improves performance and reduces emissions, delivering an overall superior owner-driver experience. In start-stop systems, the internal combustion engine is shut off when the driver stops and the engine is seamlessly restarted when the driver accelerates, which lowers emissions and improves fuel economy.