[Cymon]

For balance, I much prefer tethered. In my case the cable wraps tidily around the charger, is always there and ready to plug in, takes seconds to unwind and connect or disconnect and put tidily in its place! Standard 5m length easily enough to reach either car. No digging around for a separate cable, unrolling it, connecting both ends (and trying in the dark to connect the wrong ends together), then having to put it away again when it's finished with. Your situation may of course differ!