I have been using mission planner version 1.3.77.1 build 1.3.8333.17290
Arducopter 4.2.3
I got all other parameters updating at desired frequency update but battery status alone not updating.
https://drive.google.com/file/d/1uhoqBKoz3RxYcSwUVtPNDENs_zWF_LDa/view?usp=drivesdk