How are your externals wires? The pack at 0v might have a lower resistance connection.I am scratching my head here...
I measured the batteries after I recovered them:
Mavic: 4 bars
External1: 0 volts
External2: 10.6 volts
External3: 11.1 volts
Before the flight I charged the externals and did NOT overpack. The mavic battery was brand new and its 2nd flight and charged on the "blue" after market charger port2. Obviously the main battery switched off and started charging at some point. But the remaining battery levels have me puzzled. Any thoughts??
I'd do a voltage drop check on the bench at full throttle. Tape it to a brick and give it full up while measuring voltage of each pack.
Also what voltage were your externals charged to? If it's an issue, I'd charge the stock battery on a stock charger to begin with. You won't gain a lot from a few extra % in the main battery.
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