charging a modded Pure Evoke 2

Hi all,i brought a pure evoke-2 non working,when i got it the tunning rotary encoder was busted,i renewed that and fitted 3 banks of 2 18650 cells 1500 mah so 3ah total at 12.6v
it runs thru a 3s bms,i have a psu 12v at 2a,will that work,ie does the bms control the charge current or the charger,i know 12v is low as should be 12.6 but thats better for the cells.TIA.