2012 honda pilot cigarette lighter fuse Tapping into the "secondary" box in engine compartment, Gen-2? | How To Replace Locate 12V
Description
If wired directly rather than through the ignition, an empty car battery can be charged through the outlet from an external power source, which is more convenient albeit slower than currents supported through electrical clamps on the car battery

Mainly about the look, I think

The cigarette lighter socket can also be useful for powering cameras, sensors, beacons, lamps and on-board refrigerators, which are extremely useful during longer journeys

Defective vaping device batteries have also caused some fires and explosions, a few of which have resulted in serious injuries
