If you connect an Apple CarPlay-compatible iPhone to the system via the front USB, you can use the audio/information screen, instead of the iPhone display, to make a phone call, listen to music, view maps (navigation), and access messages.
USB Port(s)
Honda Civic Owners Manual. Battery
Checking the Battery
Check the battery terminals for corrosion
monthly.
If your vehicle's battery is disconnected or goes dead:
The audio system is disabled.
The clock* resets.
The navigation system* is disabled.
Canadian models only The immobilizer system needs to be
...