Did anyone else buy a spark controller from Sams club?. My sams club spark came with a Motorola 5 volt 500 mil amp charger. It takes about 2 1/2 hrs to charge one battery thru the spark. I called dji and they told me that they don't sell Motorola chargers with the spark. The box was sealed and sams no longer sells the combo in the store so i can't exchange it as per dji suggested. Does anyone know how many amp charger i can use when charging directly thru the sparks micro usb port?. The dji rep could not give me that answer.