Its handy and it works. I use it in my car however using this cable when plugged into a 12v extension lead which then goes into the cigarette lighter is not the best idea so if you can plug the EcoFlow cable directly into the vehicles 12v for about a 95w charge. If you use an extension cable then the wattage will drop to between 53w - 82w depending on which type of extension cable you're using, I was using a 3 way multi socket.

I love that I can change my EcoFlow while driving to the campsite. Later on I might add a solar panel to it so I always have power in my camper van.