Phinergy claims an energy density of 8kWh/kg here: http://www.phinergy.com/default.asp?catid={00658B18-2755-468E-92CB-E66021BB4D4C} http://www.phinergy.com/def

Phinergy claims an energy density of 8kWh/kg here: http://www.phinergy.com/default.asp?catid={00658B18-2755-468E-92CB-E66021BB4D4C} http://www.phinergy.com/default.asp?catid={00658B18-2755-468... The following ComputerWorld article is related, but it's worse than the linked article that nkurz submitted. http://www.computerworld.com/s/article/9248966/Electric_car_battery_tech_lets_you_go_1_000_miles_between_charges http://www.computerworld.com/s/article/9248966/Electric_car_... EDIT: The two Alcoa press releases are below, but they don't add much: http://www.alcoa.com/canada/en/news/releases/2014_phinergy.asp http://www.alcoa.com/canada/en/news/releases/2014_phinergy.a... http://www.alcoa.com/car_truck/en/news/releases/2014_02_05_Alcoa_and_Phinergy_to_Develop_and_Commercialize_Batteries.asp http://www.alcoa.com/car_truck/en/news/releases/2014_02_05_A...