Originally Posted by stonecutter
My understanding is that for the same C rating, a 600 mAh battery provides twice the current discharge capability as that of a 300 mAh one. So there is a trade that needs to be considered. I just tried both 600 and 300 Nano-Tech's, and with the 300, climb rate is essentially zero, whereas with the 600 it is at least flyable. (Observations are of my old beat up v929, YMMV.)
true higher capacity supplies more current for same c rating by definition. i also get noticeably better performance with 600mah on my v929 but it does fly with 300mah. my v939 size quad flies better with 300mah than it does with 600mah or 138mah but it does fly with both. 138mah is not big enough for the v929 though.
i guess designers chose best battery for a given size. if the quad actually wont lift with half size battery then i suspect either the battery or the motors are on their way out. or maybe im just lucky to get unusually strong cells. they are hk cheapies though so idk.
or maybe our definition of "fly" is different. im pretty happy if i can hover and move from one place to another (easy to please. lol).