I use an iphone 5s for my mavic pro with go4 and keep getting the "mobile devise cpu overload " warning followed by video lag. Its worse on hot days. Also a 20 minute flight drains 30-40 % of my iphone battery and the battery gets real hot. If i buy Litchi will these issues go away ??? anyone using Litchi give approx battery drain for a 20 minute flight and does the battery get hot ? any video lag issues with litchi ?? thx