1 Smart Fly Batt Share, This will balance the batteries and keeps one regulator from becoming the domiat power conduit. My batteries are never more than .01V different after 6 flights.
This is the only component in this setup that I do not agree with. It introduces a single point of failure, and what's the point? Why is it desirable for both batteries to discharge at the same rate.
When you simply plug in 2 regulators without the battery sharing gizmo one will discharge faster than the other, but in high current draw situations they both supply current. Each serves as a backup to the other with no sharing device required.
TF