Hi all,

I am not sure if this issue was reported before, but I could not find it.

I wanted to use Pixhawk on the Turnigy Integrated PCB Micro-Quad. I followed the following video for the parts and the assembly

https://www.youtube.com/watch?v=j46fSNIui7M

However, I replaced the controller with a Pixhawk. I used the 3DR power module to power the Pixhawk, but cut the thick cables and replaced them with less thick ones that match the wires of the remaining components as I thought the thick wires are too big for 2S LiPo battery.

I am using 850mAh, 2S batttery.

The ISSUE is when the battery is fully charge I could fly the quad for a minute and then the battery dies, the charge drops from 7 to 5.5V. Tow batteries are gone now for the same experiments. I am not sure what the problem ism but am suspecting that the 3DR power module is not suitable for 2S LiPo battery and it's causing the problem.

Any suggestions? 

EDIT:

The problem was that I didn't fully charge the batteries before the first use. I fully recharged them, and then they worked just fine. 

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Replies

  • Thanks all. Problem solved. The issue was that I didnt fully charge the batteries before 1st use!

  • 2s 850 ma is not going to fly much for very long, did you fly before the replacement? 

  • that's not an "issue", to report unless you think the power module or pixhawk can absorb or dissipate all the energy in such short time.

    power module is simply a shunt with a 5v power supply, and a voltage divider plus an amplified output of the difference across milliohm resistor.  - it works the same on 2s as 4s battery.  

    you should measure actual current, and/or capacity of the batteries.

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