Doc Brown came up with the flux capacitor by smacking his head on the sink as he was hanging something in the bathroom. Fortunately, all you have to do is click a few buttons on a website and wait. While this Flux Capacitor is unfortunately missing signature time-travel capabilities, it does have something the original doesn't—a USB charger for your phone.
The Flux Capacitor Car Phone Charger was originally an April Fools' joke, but this officially licensed accessory is becoming a reality. Besides being able to charge two tablets simultaneously thanks to a hefty 2.1 amp power supply, it does that rad light sequence of the real one.