18650 battery protection board
From a quick read though, it looks like this is meant to be used with a charging circuit to protect your batteries.

You shouldn't be surprised it says the module is not a charging circuit, it is after all called a PROTECTION board, not a CHARGING board. 

So yes, you can use it for your circuit, you will just have to make your own charging circuit and use this board as protection to detect over-voltage, over-current and short circuit protection.