The 12V system in the hybrids use part of the high voltage traction battery and the car is a dead duck if it let the 12V drain the traction battery too far. So it cuts it off at a point and provides that boost button to start it again. If you are using Kia Connect w/the app, it is constantly sending data, even when off. This is probably the biggest battery drain culprit, but there are also proximity sensors that are always on, etc. For long term storage, there is a black cable connector in the engine bay right next to the orange cable that is next to the passenger side strut tower. This is the 12V disconnect, but I believe you will lose your saved settings, etc.
