Ending today, ThinkGeek offers its Back to the Future Flux Capacitor USB Car Charger for $12.49 plus $6.95 for shipping. That's $3 under our mention from a month ago and the lowest total price we've seen. (It's a current best by $8.) This device won't help you travel through time, but it can charge two devices simultaneously. It also features an on/off switch for the Flux lighting effect and flexible pivot arm.