Plug-in hybrid vehicles (PHEVs) are the promising solution to the anxiety about driving distance of electric vehicles. However, large battery of PHEV could compress cabin space. The high input/output performance of SCiB™ makes it possible to reduce the size and weight of a battery system. Therefore, SCiB™ does not restrict the available cabin space and driving performance. In addition, PHEV with SCiB™ is rapidly rechargeable.