[Luke]

If you want an outlet, the Powerlet (used by BMW) is a lot better suited to bikes than a cigarette-lighter socket. Smaller, better connection, weatherproof.

 

[Luke]

How to remove it without scratching? Will it be possible to put it back after?

Slide a sharp knife into where the black plastic and chrome nut meet - it will go in about 1/8". Gently pry the plastic up. It will go back into the hole with no problem if you want.