I picked up a used Zoom today with the smart controller for a great deal. Drone looks perfect I try and power up the smart controller and nothing it's dead. l plugged it in to a regular 3amp 5v usb charging hub I have on my desk not knowing it needed a 12v 2 amp adapter for fast charge mode. An hour later I still can't even power it on so I so some searching and end up doing the power button back button reset and it boots up with 5% power. I was like how....... it was charging for an hour! 3 hours later the second LED is now lighting up and I'm at 37% is this normal??? I guess they really mean SLLLLOOOOOOOW charging with a non 12v USB.