Hey Guys,
I just purchased a Qaud – D with 880kv motors and 11” props from 3D Robotics. I will use a Dx6i and spectrum AR6210 receiver.
The question I have is what battery would people recommend? I have been looking all over the forums for recommendations and it sounds like most people would recommend a 5000mAh battery. The C rating seems to differ. I have read that 30C was good enough while others recommend at least a 45C battery.
I currently have These two batteries in hand while I am waiting for the quad to ship. Will the following batteries work?
2200mAh 30C with bursts up to 40C:
3300mAh 30C with bursts up to 40C:
I am looking into possibly buying one of following batteries.
These batteries have 30C with bursts up to 60C:
3000mAh 11.1v 30C - 3S Grayson Gold
4000mAh 11.1v 30C - 3S Grayson Gold
5000mAh 11.1v 30C - 3S Grayson Gold
Any help in choosing the correct battery would be greatly appreciated. Also If you could provide links to the batteries that you have that would be a great help.
Thanks,
Jared
Replies
www.ecalc.ch is your friend.
I think the formula is something like maximum amps per motor x number of motors = C draw.
So...4 x 20A motors = 80A, or 80,000mA. To run all 4 motors at maximum, an 80,000mAh battery is doing 1C. An 8,000mAh is doing 10C. A 4,000mAh is doing 20C.
Errr...I think. Maybe. Sort of. Am I on the right lines?
Regardless of my figures, remember - the closer you run to the rated C of the battery, the hotter and more ragged it will run. So go for big C's where you can (though this invariably adds cost).