I'm very conservative with battery life, typically landing with 10min of battery life on my Mav 3 but I have 6 batteries so I just keep recharging them. My buddy also has 5 (?) batteries but he tends to stay "out there" till the last minute. On more than one occasion he has had to come back to the road instead of the car as he could not make it back. The other day I was reminded of his "technique" that I thought I'd share. After I returned my drone I heard his controller say (something like) "Return to home" and it initiated a return to home. A few minutes later I heard "landing" and knew his drone was not back yet. He cussed at it saying, "I still have 4 minutes left" (or something like that). He prevents a forced landing by keeping the left stick forward so as to tell it to go up (which it apparently doesn't) and the right stick up so it keeps on heading home. He landed with 2 minutes of flight time showing. This isn't my cup of tea but if you find yourself with a drone telling you it is going to land...push both sticks forward and see how much closer you can get to home.