I have a qav 250, currently I use 3s 11.1v lipo, I get about 5 min of flying time, how can I increase flying time and how big of battery can this qav250 can handle?
Typical 250 quad gets around 5-6 minutes, it's the nature of the beast. The more you go for longer flight time, the more manoeuverability you sacrifice. That being said, I've used a 3S 35C 1800 mah with good results. Problem is, a 1500 mah is in the 100mm length range but as soon as you go to 1800 mah, they jump up to 140mm. Which is doable, but lose your option of using any kind of runcam