You don't have to do that. Hyundai ix35 has a system of energy saving. When the engine is switched off, the headlamps shall be automatically switched off in 1 to 2 minutes. The audio-navigation system is turned off in 5 minutes. The car magnet operates within one hour after the driver takes out the key from the ignition, but it can be manually activated if desired. All of these options are aimed at saving the battery.
