Mavlink message for battery status

Hi guys,
I need to interface my ardupilot to an external board for a project at the university.
I’m able to read all mavlink messages but it’s seems that the ardupilot code doesn’t send any Mavlink message #147 (Battery_Status). Somehow it should be sent, since I’m able to see the battery voltage in the mission planner or in the qGroundControl.

Looking into the code GCS_Mavlink.cpp and GCS_Mavlink.h didn’t help me

Do you know where is the battery voltage information stored?


I would guess its actually sending this message so you can see the voltage ect in MP