2nd Horizon v3 Battery Mod Test (worse):
100% to 50% Hover.
Battery Starting Voltages
Main Starting 17.5, 4.35, 4.37, 4.37, 4.37
EXT Starting 17.5, 4.36, 4.37, 4.38, 4.38
Battery Ending Voltages
Main Ending 15.5, 3.87, 3.86, 3.88, 3.89
EXT Ending 15.9, 3.96, 3.96, 3.98, 3.97
14 Minute Hover Flight Time.
No Bueno.
The ending voltages remain a mystery. The ~.10 voltage differences should be a concern as we have learned from healthy drones that kind of variation in cells is no good. The external batteries and main P3 battery are not discharging at the same rate.
Perhaps Horizon can shed some light on this. I measured each right after the other approximately 25 minutes after flight and the main and externals were charged together.
I will do another test tomorrow but doubt I will see anything different. My setup is minimalistic (cut-down carbon fiber battery boards).