Faulty Lipo? Voltage drop from 24V to 6V

Hardware Other Hardware
1

Hi all,

I made two flights with a fixed wing with two different 10.000 mah 6S Lipos without problems. After that I wanted to make a flight with a third 10.000 mah Lipo and when I gave throttle, the motors didn’t have much power, almost none. I took out the the Lipo, checked the voltage and it seemed OK.

Back home, watching the Dataflash logs, I saw something strange with the third lipo. The voltage was OK with motors off, but when I gave throttle, the voltage drop to 5-6 volts.

This is the voltage from the log:

Voltage
Voltage1077×927 108 KB

Is it an indicator of a faulty lipo? Or maybe I have to look for another parameters or components? That day was hot, about 35º C, I don´t know if it has something to do with the problem.
I don’t have that Lipo to test now, but with another one it´s working OK and the motors have the normal power.

Thanks.

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2

Hi dobbler,

Warm temperatures are fine for lipo batteries.

You should realy double check this one under load before doing another attempt to fly.

Regards,

Maarten

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