Just picked up some used 3dHobbyShop builds for cheap off craigslist... very excited for my first 3dhs aircraft's. Bought them with no information on what the previous

59" AJ Slick and a 58" Edge 540

Need some advice as to what is the normal battery pack to run in these. 4s, 6s?

Edge has an Exceed-Rc Rocket series 4120-515kv (86MC451) with a Castle Phoenix Edge 75 (not sure if its been programmed or not)

Slick has a Exceed-Rc Monster Power 32 says 42-50 kv770 with a Castle Phoenix Ice 75 (again not sure if its been programmed)

I believe the slick is from 2011 and the edge is from around 2013? Visited all my local hobby shops and they are all phasing away from RC Aircraft and just doing primarily rc cars/trucks, so no one had an idea what the correct battery for these electronics were.

Not trying to get an overkill setup that'll run hot, just want a good cg and flight time.
Thanks -Josh