I'm fairly new to electronics and have been reading extensively into it, but I'm unable to map all the concepts together. My project is a tiny drone involving (four) 4 N40 DC motors, rated 26k RPM at 3V 0.3A, and 42k RPM at 6v 1.68A.
From my understanding, to power the motors at full capacity, I need to provide
~10 Wh, that is
(1680)mAh * (6)V = 10.08 Wh each.
I have a set of 3.7V 1,000mAh batteries (3.7Wh), thus I would need four batteries where each two are connected in parallel and then the the circuit is eventually connected in series providing a total of 7.4V and 2Ah or 14.8Wh. Theoretically, to provide 40Wh to all four engines, I would need to provide total of 7 pairs (14 in total) of batteries connected in parallel to provide 7.4V at 7A leaving me with a bit excess of power. Is my understanding correct as that seems to be a bit excessive?