Electric toothbrushes have been doing it for years: Wireless electromagnetic induction charging. It basically means using magnetic fields to transfer electricity. A group of students at Karlsruhe University of Applied Sciences (HsKA) in Germany have used the concept in an ultralight go-cart (130 lbs). The cart, dubbed E-Quickie, receives power from a electromagnetic strip embedded in the road. In this case the students built a small indoor track. The car is able to get all the juice it needs from the charged track, but it still has batteries to get to and from the track. The students say such a system could be employed in highways to radically extend electric vehicle range. It works like this: Use your own juice to drive around town, then use the highway’s juice on your commute to save battery power.