Battery Voltage Major Drop

ArduCopter
1

Hey guys,

During my last flight test I tried switching from a 4s to a 6s battery. My equipment setup is a holybro PM07 distribution board, Pixhawk 4, Kotleta 20 ESC’s and BrotherHobby Avenger V2 2507-1500KV motors. When switching batteries I made sure to change the battery type from 4 to 6 cells and recalibrated ESC’s. When throttling up the voltage dropped in half in the current spiked to the limit of my PDB to compensate.

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Does anyone know why this might happen? This battery is a turnigy 6s 3000mAh and was left at storage voltage until about 1 day before flying when it was charged. It has never been used before then.
(This is on PX4 but it seems like a problem that could on any quadrotor regardless of firmware)

2

My guess is that the current spiked and that caused the voltage drop, and not the other way around.
Check you cables for short circuits

1 Like
3

Checked the cables, no short. In any event it would seem odd to me a short happened to occur right when I switched battery types.