RE: Kingtech K80 F Start Up.
as per my post #21 i still beleive you have a lipo problem and you should check it or even better try again with a new one or borrow one just for a start up that is if you want to use lipo.
a sudden drop from 8.4 to 7.9 clearly indicates a problem. as i wrote before my lipo from 8.4 went down to 8.14 after 2 flights.