I had a lot going for me on my solo. 1. Great CFI. 2.We had been practicing landings for two days prior. 3.Most of my training has been in the XT I purchased. It was a little surreal. It was late in the day and I really wasn't ready to call it quits for the day. I asked Doug over the radio "I know it's getting late, but can we go around one more time?" His reply was "how about I get out and let you go around?" I kind of hesitated a little then said back "Ok I'm ready." Then off I went.
Jeff, it could be voltage drop related. USB uses 5V and it will drop if you use long thin wire. I use the product "Brunton All Day Battery". It extends your gopro battery life to 7.5 hours even during you use wifi. That is the real duration I tested. I'm very happy with it. But it fits only newer versions of gopro cameras (3 and 4). If you use these cameras, I highly recommend it. You can get it from ebay by searching "Gopro Brunton All day". The quality is exceptional and reasonably priced.