Abstract: The present device is a temperature regulation system for a vehicle turned on or off. The temperature regulation system includes a rechargeable battery for supplying power to an air moving system and a heat exchanger in accordance with demand signals from the thermostat, independent of the on/off state of the ignition system. In one embodiment, a DC motor is electrically connected to the rechargeable battery and rotationally coupled to a variable-speed compressor replacing the existing compressor of the vehicle, improving efficiency and extending the use of the rechargeable battery. The temperature regulation system may be used to heat or to cool the vehicle when the temperature of the air in the vehicle exceeds a certain threshold.