Logged where?
Viewable from traccar manager will be ok
If your device reports battery info, you should see it. There is no need for extra configuration.
I see it but not historic values from last few hours only latest in state
It means that in the last message it was not present.
Surely when I crank car power voltage increase and it should log? But where? I'm sure I used to see it but I've been using gpslive for 3 years so might be imaging it ;-)
Anyway to extend what is logged like battery etc? I saw the 9 basic functions mentioned but battery is something I would like to see logged can I force this somehow?
Some black magic :)