From Thinkgeek:

The Back to the Future Flux Capacitor Wall Charger is modeled after Dr. Emmett Brown’s device that makes time travel possible. This plugs in any standard three-pronged outlet (Type B) and charges devices via USB. When your phone hits 88 percent, you’re gonna see some serious… stuff. Probably pictures of corgis and kittens, but serious stuff nonetheless.

[Back to the Future Flux Capacitor Wall Charger – $24.99 $19.99]