The hazard flashers operate with the power on or off. The battery loses charge and may have insufficient power to restart your vehicle.
Hazard Warning Flasher  The hazard flasher button is on the center console. Press the button to turn on the hazard flashers if your vehicle is creating a safety hazard for other road users.
When you switch the hazard flashers on, all front and rear direction indicators flash.
Press the button again to switch them off.