So I will start with these guys - https://www.amazon.com/gp/product/B01M7TX4KS/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1
There is no detailed specification about current, but the similar model has:
Load: 3.2A @ 3.7V
Does it mean that I will need adapter that can get ~12A of current for 4 motors? Or I need one that has ~12W of power?