This is not a technical but more of an operations question about vehicle battery maintenance on dealership lots. Vehicles today have a multitude of electronic modules which create a parasitic draw on the vehicle battery when the engine is not running. Some vehicles sell within 1 - 2 weeks after arriving at a dealership lot but many sit for months before being sold. At mega-sized dealerships with hundreds of vehicles how are the batteries kept charged due to a lengthy sit on the lot and not run? During winter months in cold climates a discharged battery is very susceptible to freezing and could be permanently damaged if left discharged. Does a dealership employee visit each vehicle on a periodic schedule and start and run the engine for 10 - 20 minutes to replenish the battery? I would think that takes time and consumes fuel which would eventually need to be replenished.