frame: Quad Light 14
brand: http://carbon-cnc.eu
configuration: X4
tubes width: 14mm
flight controller: Pixhawk with GPS
motors: 4 x RCTimer 5010
ESC: 20A, 2-4s
propellers: 17x5,5 inch
battery: 4s Multistar 10000mAh

The important thing is that the biper is set to 3,6V and the copter lands at 3,65V per cell. Why is is so important? because there is is still plenty of energy left, enough probably for another 5 or maybe even 10 minutes, but going down 3.6V could finally damage the battery, so to keep it healthy I decided to stop this test at 3.6V per cell.