7.2 or 14.4 volt?

[ewan]

Why Ni-cads? Ni-Mh are usually better suited for featherweights.

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[leorcc]

That totally depends on the type of feather. For flippers and axes, NiMh are well suited becaue they keep their voltage up. But for a high powered spinner NiCads are the better option. They can deliver more amps than any NiMh.

NiMh is getting better at delivering amps, but the internal resistance of NiMh is still a lot higher than NiCad.