I will put mine up for a test on flight time soon and post the results for you guys. I made my own and the specs are as follows. FC X580 AL+ Glass Fiber Hexacopter Airframe Glass 580mm Folding Frame, DJI Naza M-Lite with GPS, 950 KV Motors, 25 amp ESC Simmon K Style, 10X4.5 props, 8,000 mAh 14.6 Lipo for motors and a 2,200 mAh 11.1 V lipo for FPV and Gimbal, Tarot 2 Gimbal with updated firmware, GoPro Hero 3 for video and FPV, 900 mHz 500 mA FPV Transmitter, and a wholle mess of cool LED Lights. My longest flight so far has been 15 minutes with 15.8 volts left after landing. I have my failsafe set for 14.3 volts so I am sure I have some more flight time.
And remember I will get great flight time if I remember not to use those silly cone bolts they sent with the motors. LOL.