Docking is a pretty interesting idea. I was thinking, could it just drop off a battery that rests in the dock, and then the drone comes back to pick it up late

Docking is a pretty interesting idea. I was thinking, could it just drop off a battery that rests in the dock, and then the drone comes back to pick it up later? Docking works too, but occupies the drone for the duration of charging. Maybe less total energy consumption for travel, though.