Individual 18650 capacity formula? | Best brand laptop battery for 18650 cells?

[USSR]

people might stumble on this post so just for their help

here is a way to calculate the capacity of each cell.

Which laptop battery pack yields the best, highest capacity 18650's

I was wondering which laptop battery pack yields the best unprotected 18650’s, there is a recycle place close by where I can get a hold of a variety of used laptop battery packs for practically free, just want to know what to look for. Any tips?