The AutoMeter SPS-12 Smart Power System provides power through the vehicle’s OBD-II port, or a 12V outlet with the optional adapter, to keep vehicle computer systems supplied with power when the battery is disconnected or removed. The SPS-12 also accurately monitors for parasitic electrical draw that could cause the battery to discharge when the vehicle is not in use. It preserves radio and infotainment settings, memory and engine/transmission adaptations as well.