A lithium ion battery has created a large market as a compact and light weight power sources for Mobile-IT devices such as a mobile phone and laptop PC, and the growth of market is continuing. From 2010, it began the application for electric vehicles. It is clear that a new market for electric vehicles has been created. I describe the development history of the lithium ion battery, the current situation and the direction towards the coming future. I will also explain future car society that will be realized by technological innovation of these lithium ion batteries.