Lost connection between Radio and Iris during MP session

I am not sure what happened, but maybe someone can point me to the error I made:

After upgrading the firmware to 3.1.5 I went through the recalibration process, loaded the Iris with Front GoPro sessings and did the accelerometer calibration. The radio

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3DR Iris and battery problems

Greetings,

I got my Iris about 4 weeks ago and the weather does not cooperate. So  I have only a few flight hours thus far.

Since the last flight the Iris does not recognize the full batteries any more:

I got two original batteries. They are both fully

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