As above in title. If I were to run a cable from the battery/alternator/that-thingy into say, a lighter socket, and use that to charge my MBA. Would the power provided be stable enough? It is but a mere 50cc scooter, I don't know how much power the alternator actually provides or whether it's stable. I know people that've connected USB outlets to charge their phones/GPS. Will an unstable current damage the battery or charger?