Thanks for the replies.
My quick math for figuring out the amps required gives me 500w / 36v = 13.9 a.
Does that mean that I should try to get to over that value in amp hour ratings on battery pack (in parallel)?
I am looking into building a 36v 500w trike.
I am already heavily invested in Milwaukee m18 cordless tools, so if possible I would like to keep the same battery format and be able to use the charger that came with then. My idea it is to use 2 m18 9ah Milwaukee packs in series to get me to...