Can I leave the device plugged into my car while I drive? Yes, leaving Engie connected to your car is recommended. Note: Engie device uses 40 mAh, similar to a headset or a vehicle alarm system. Therefore, leaving the device plugged in does not affect battery consumption. Related articles The car OBD port is behind a plastic cover How is fuel efficiency calculated using Engie? EngieAPP Installation Guide How do I connect my car? My vehicle is not supported. What should I do?