I never push trying to get that last few moments. My average flights are always under 12 minutes. and then I get the warning that the batteries are too low for takeoff. usually shows about 2 minutes remaining, today I it was at 4 remaining but said to low for takeoff.
Also distance is a lie. they say 9000+ which is about 1.75 miles. Ya right, I was flying over my home town and the signal was in the red at around a half mile without any obstacles what so ever. I've notice the distance was a lie out in the country where I usually fly to. It's not about power lines or man made stuff that interferes.... I do live at around 6500 elevation so maybe that could have something to do with all these things. Don't know....