I have two RC ESC that I want to use for driving two motors from one controller.
I have two choices, the 1st one Y controller adapter and one Y Parallel battery adapter 6S2P
http://2bfly.com/assets/Brushless-Wiring-Type-1-sm.png
Second option, one Y controller adapter and 2 batteries (no parallels) 6S1P
http://2bfly.com/assets/Brushless-Wiring-Type-4-sm.png
Which is the more efficient?