Set this up using the original battery monitoring board from a destroyed battery and 3 new LG HG2 18650 cells. I couldnt get the mon board to turn on so I powered the Mavic through one of the battery plugs I installed on the side. The mon board was plugged into the balance wires on the 18650 pack and was reporting cell voltages and total voltage accurately throughout the flight.
I reduced a volt min parameter down to 2.5v to allow the 18650 cells to go down that low. As you can see from the screen shots I got 16 minutes and I had one cell faulty. I ran it down to 2.11 and the other cells were still at 2.8v (and had 600-700mAh remaining). This setup could proably get 18-19 minutes on just 3 cells.
After the flight the cells were warm but not hot . I'll get some more cells and go 3S2P next.
I reduced a volt min parameter down to 2.5v to allow the 18650 cells to go down that low. As you can see from the screen shots I got 16 minutes and I had one cell faulty. I ran it down to 2.11 and the other cells were still at 2.8v (and had 600-700mAh remaining). This setup could proably get 18-19 minutes on just 3 cells.
After the flight the cells were warm but not hot . I'll get some more cells and go 3S2P next.