[njvagabond]

Blue Sea makes a locking one. I have no experience with it. They also have little panels that would incorporate a 12V along with USB like the one you posted
Amazon link

 

[njvagabond]

I'm building a family-trip oriented van. I have to plan for some of those crappy cigarette lighter style connectors. I do appreciate that they tend to work loose and are otherwise pretty irritating.

I think the pulling out problem may be as much a problem with the plug as it is with the socket.
Serious comment, which required a great deal restraint to avoid double entendre wording.
You know seeing it is for family trips.

 

[njvagabond]

But these units

Do these (and the Blue Sea) actually have some sort of locking mechanism ...like a twist lock or something?

 

[njvagabond]

On many devices, my fridge included, I cut the original power cord and insert mating M/F connectors in the cut. Now I can use the cord as originally intended, or I can plug directly (with a locking tab) into my house battery system.

Warranty voided? Pffft. 🖕

Gotta link or technical name? I have something like that on an old thermo-electric cooler so it can be run in reverse to heat, but no lock on the connector.