Daisenryaku: Dai Toua Kouboushi - Dai-ni-ji Sekai Taisen Boppatsu! - Suujikugun Tai Rengougun Zensekaisen

3DS sports 3- to 5-hour battery life for 3D games

Nintendo uses 2011 World Event to show off new portable and give specifications; system will last five to eight hours for DS games; all figures based on brightness of screen.