OsmAnd protocol and parameters

I see that the Android app is using the OsmAnd protocol, but in this page https://www.traccar.org/osmand/ I don't see the parameters to send the battery level, accuracy, altitude, speed, distance and direction.
Where can I find them?
Thanks!

In the corresponding decoder class.

Anton, thanks for your reply, but...hemmm...where do I find the "corresponding decoder class"

I think he means https://github.com/traccar/traccar/blob/master/src/test/java/org/traccar/protocol/OsmAndProtocolDecoderTest.java

After looking at the "Test" there is a "batt" variable but not a "charge" variable listed. But it is the same protocol that the phone and android apps use and they are able to communicate that data. So what is the proper variable name in the url for charging? I tried charge and that doesn't work.

Both "batt" and "charge" are supported and mean different things.