Abstract: A method and apparatus of an emergency starting power supply used to start a device or energize a battery. This emergency starting power supply automatically detects the contact impedance of the device or battery and provides prompts from a user interface to the user based on this detected contact impedance. The prompts guide the user as the user on how to adjust the impedance of the connections to the device or battery so that it is connected optimally to the device or battery so that the emergency starting power supply can provide the device or battery with enough energy to start the motor or engine.