My Spark came with 1 charging cord which charges both the aircraft and the remote controller batteries. I'd like to have 2 cords so that I can charge both aircraft and controller batteries at the same time. It looks like the tip at the end of the cord that plugs into both the aircraft and controller charging ports might be DJI proprietary. If this is the case does this mean I have to buy from DJI directly? If I do, no problem but I don't see any section on their website which carries such parts for sale. Are there any online sellers that sell non OEM charging cords that would work properly? Help!