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 charged. One shows 12.59V, the other one 12.63V.
When plugging the batteries in, the Iris immediately after the boot process is giving acoustic and visual "low battery" alarm, whether its connected to the PC or radio or not.
When turning on the radio, it shows 10.5V or less (which should be the original low batt threshold?).
Connecting to Mission Planner, I followed the procedure as outlined in the APM community and as directed by 3DR support (http://copter.ardupilot.com/wiki/common-measuring-battery-voltage-and-current-consumption-with-apm/#Setup_through_mission_planner). Still the same problem.
I opened the Iris and checked all contacts on the Pixhawk and the other boards. Everything is tight.
With the weekend, 3DR support is not available. Does anybody have any ideas how to further narrow down the problem?