If it were me I'd choose the first "safe parallel charge board" listed:
1. It gives you 7.4V plug ins (the last listing is for 3.7V)
2. It has plenty of plug in choices
3. it has fuse protection on the board
I notice that the cell packs you've chosen offer up to 5C charge rate...I wouldn't recommend the charge rate of 1.5A as it is the limit of your fuse protection on the charge board.
Make sure you have some sort of charge protection bag as even little packs like these can cause a nice chemical fire if charging and the unforeseen puff/meltdown happens.
Once they create hard cases for these small packs I'm all-in on the 1/27TC concept.