Volkswagen wants to ensure you'll always have enough range to drive an electric car home after a big game or concert. The company has offered a peek at a mobile station whose 360kWh charging capacity and 100kW DC quick charging can top up as many as 15 EVs (including, of course, VW's ID cars) with an average time of 17 minutes. Instead of having to find a dedicated station after an event, you could recharge in the parking lot -- think of it as a battery bank for your car instead of your phone. And if it runs low? The organizers just have to swap it out for a fresh one.