60amp esc Question on Batteries

[monojeff]

About to get one of the 1st gen Aquacraft 60amp esc in trade.
It has some issues arming so I figured best thing to do is either use a bec or separate battery I was told just to disconnect the red wire.

I am wondering can it be ran on 2s or 3s?
Also should I get a larger cap to add to it or is stock ok?