I am flying the DJI Phantom Vision 2+. I purchased two batteries and I have fully charged both of them. I had two brief, but successful flights. I am not trying to fly for a 3rd time. I press the on button once and hold for 2 seconds. I then press again and hold for 2+ seconds and the unit does not turn on. Also, not sure if this is weird or not but, when I press the power button all 4 lights on the battery turn on at once, they don't turn on one by one until they are all lit.. they just all turn on at once. When I plug the unit into my computer and open the Phantom software it tells me to connect my Phantom because it can't tell that its already plugged in due to the unit being off. I have tried this with both batteries and nothing is working.. Any ideas?