It says at the bottom of the "Features" (http://www.dji-innovations.com/feature/phantom-features/ http://www.dji-innovations.com/feature/phantom-features/) page

It says at the bottom of the "Features" (http://www.dji-innovations.com/feature/phantom-features/ http://www.dji-innovations.com/feature/phantom-features/) page 10-15 minutes of flight time.