There are many parameters that affect flight time, such as:
1. Flight mode. When you fly in C mode, the drone uses less power; but when you fly in S mode at high speed and accelerate faster, the drone will use more energy to accelerate.
2. Wind. When you fly against the wind, the drone uses more energy. Even when you hover your drone in strong wind, the drone uses more power to stay stable than usual.
3. Filming. Recording movies at high resolution and high framerate will consume a lot of battery because the image processing chip has to work a lot to compress and write the image to the memory card.
4. Attitude. To move the drone to 500m altitude, the drone uses more energy then to move the drone 500m away.
5. Temperature. Flying in hot weather will drain the battery faster than flying in cool conditions.
If I take off my drone in a cool room (very little wind) and keep the drone hovering at 2-3m without filming, my
Air 2s can flys up to 26 minutes until 10% battery remaining and up to 29 minutes until 0% battery remaining. A battery with 0% remaining capacity may dies after a flight, but it can actually provide up to 29 minutes of flight time.