Li Ion CC-CV Charger needed for standard protection board?
It doesn't look like it has a CC/CV only balancing, hook the charger up to the CF-4S30A board 

Here is a video that shows how it works:


Source: https://www.mikrocontroller.net/attachment/379678/610606910_1_1000x700_kontroler-bms-3s-4s-25-30a-zaryada-razryada-zaschity-balansir-dlya-li-ion-vinnitsa_rev003.jpg