Personally I wouldn't bother with the cable. the battery on them lasts a good few hours, spare ones cost nothing as well.
Also I think they are Li-ION Batteries, which don't tend to take well to trickle charging ( basically being left in on charge the whole time and not depleting ) it's why most Laptop Batteries die after a year.
I'm no Mobius expert by any means, but I think plugging the USB in puts it into PC mode and that may be why it's not working in the car, unsure, others on here have them and will correct me I'm certain of that.
But batteries for them are about £7 last time I checked on Joovu, £4.90 ONLY currently, maybe + VAT and Delivery etc but it's dirty cheap, just stock up on them. can never have enough batteries.
Standard pretty much everywhere in the US, some modern BP pumps do this, have a red button / trigger thing, fill with fuel and depress red thing whilst squeezing and it'll stay filling when you let go.
^ that ban is usually B2B and pre sale "gifts" or Bribes as they are otherwise known as, no harm in rewarding great service at all, especially not in the retail / motor trade when it very seldom happens.
Oh seen, yeah just gas it with any Fly killer and it'll kill it off, I had one for a few months once called George, we were friends once until he tried to come into the car when I was doing 60odd then we had words and he was made to leave, but he was nothing compared to some of the evil things you get over there.
Get an RAC Trackstar sticker, you wouldn't nick a car with that on it, it's the only one that truly works, unless the car is encased in PB or Thorium or something.
Mate of mine used to remove the battery on his Evo when he went on holiday, he used to get people try and nick it all the time ( Evo 6 tommy Mak edition ) and taking the battery off seemed to have made it go away, think thieves opened the car thinking Hazar and then ooooh no it just won't ever start.