Well the ones like you listed you can buy them in series and in parrallel but will only fit unprotected cells, the ones made in series can be made to be used for balance charging with a bit of stuffing around but you can only fit unprotected cells in them and you dont need protection for charging.
DX make some cheap 18650 battery holders that will fit protected cells, they are wired in series with no protection. Shipping is to long for me, i brought one 2 months to get to OZ, but they can be made to balance charge with your hobby charger, i use mine for testing 12.6 volt.
IMO your better off series charging and making your own leads so you can charge all diffrent sized batteries with one set up.
https://budgetlightforum.com/t/-/3118
Plug them into a charger. Most nimh Rc battery packs from 2s to 9s are in series and there is no balance charging, with li-po,s from 2s to 14s are balanced charged, laptop are wired in a mix of series and parrallel and charged as a whole, the most common form of charging and what every hobby charger is made to charge is series