I just received my phantom 3 standard and out of the box I cannot get the RC unit to charge If I understand correctly I am just meant to charge it with the included micro USB Cable - one end plugged into the bottom of the RC and the other into any USB charger? Is that correct or am I doing something dumb. I have tried with multiple USB cables and multiple wall chargers (apple, android, PC) and with the on off slider in both positions. There is nothing happening. Neither the larger power light nor any of the 4 smaller LEDs come on, or flash or anything. The cable seems to fit snuggly in the port Any ideas? Thanks!