Clothes Line – Go Green & Save Money. learn how to Green your life and Save Money … It draws power off the hybrid battery when the car is stopped and the gasoline engine is not running. If the hybrid battery runs down, the car will automatically start the gasoline engine to continue providing the electrical power. And the hybrids actually get BETTER mileage in the summer because 1) it’s easier for the gasoline engine to keep warm when it’s not running (a warmed-up …