I have a very similar setup as described here (Lynxmotion HQuad500 Drone) except I am using a Pixhawk FC.
My current battery is also a 3S Lipo. I would like to upgrade them to 4S due to the weight of my drone ( raspberry pi and 2 antennas will be added).
Will a 4S battery work with this setup or should I upgrade motors and ESCs as well? Any recommendations?