MOST EFFICIENT BATTERY SETTINGS FOR LONG TRIP WITH M2P

[E90RAW]

I need to fly approximately 33,000 feet over water/ocean to an island. I will be flying into the wind for the first 1/2 of the trip(33,000 feet), with the wind in the sails for the trip home. My question is would "P"mode be more efficient than "S" mode for the trip even though it will take longer. I have completed a trip of similar distance in sport mode and made it back with 2% battery. The M2P slowed from 44 mph to 27mph once landing mode was activated. Of course I had to use the basic maneuvers to counter the landing mode. Yes this is pushing it a bit.

 

[Mossiback]

...My question is would "P"mode be more efficient than "S" mode for the trip even though it will take longer...

P mode with anti-collision sensors turned off gets a speed between P and S modes. For the MP this is the most efficient speed to power (battery drain) ratio but I do not know if it is the same for the M2.

 

[MAvic_South_Oz]

Quite a few threads on this topic, did a search > battery efficiency < these ones stood out.

Is it most battery efficient to fly as fast as possible?

If one wanted to fly as energy efficiently as possible, for as far as possible at what speed should one fly? Is the max distance achieved at max speed?

mavicpilots.com

Experiment: Battery Drain in Flight

I wanted to perform an experiment to see the rate of battery drain during flight. Obviously, I need a consistent flight profile. No user input required when experiment is started. So, I decided to use Point of Interest mode, and let my Mavic fly in circles. Then use the flight logs to plot some...

mavicpilots.com

Seems P mode in general, but some situations may require Sports mode to make headway (if flight badly planned with wind).
Most important, like an auto, light on the 'fast pedal' (acccelerator), no up and down revving, try and maintain steady speed / altitude and stay low as possible out of higher wind.
Probably like an auto, cruise control might be the most steady way to fly, using either an automated DJI app mode (waypoint mission, tap fly, that sort of thing), or an aftermarket app like Litchi, Drone Deploy, Pix4D, Autopilot, Dronelink, etc.