Prius_WindTunnel_BE5A4061D399929068301EAC6012A0F6ABA2B75DToyota revealed details on some of the new technologies it will introduce in its fourth generation Prius. Most notably, the Japan-based automaker will offer two choices of battery packs with higher energy density for the 2016 Prius: lithium-ion or nickel-metal hybrid. expand full story