Battery capacity. What's nominal?

[skeeter]

Originally Posted by ChILd_ReBoRn

And swap them when one is depleted?
I have some 18650 cells lying about, I'll solder them in 3S configuration and use it for testing purposes. If they suffice, I'll order a dedicated LiPo pack(s).

The 18650 batteries are not designed to handle the discharge rate(s) that may be put on them. For a test they should work one or two times.

As Joe said TWO 3000MAH batteries is good. That way you can have one on the charger while you're running the other.