The first thing we have to do is to know the specifications of our battery. In order to do that we will use the multimeter to measure the voltage of the battery, as seen in the picture below.
In the GCS, we will go to Initial Setup
After that we will go to Optional Setup --> Battery Monitor. In this screen we will fill the neccesary information of our battery (Battery Capacity = mAh, voltage = the measured voltage).
Finnally we will go to Config Tunning--> Full Parameter List, and there we will search for the parameters related to the battery. In case that the parameters are not the same as shown below, change them to look like this:
If we don't see the voltage, restart the Erle-Brain.
WARNING: if we change the battery type (mAh,voltage...) we will have to recalibrate in the Battery Monitor section.
This configuration will be valid for all the vehicles: copter, plane, rover, hexa...