@Michael_Oborne
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
something to do with this? Do you think the serial port baud rate is set too low to be able to send through so many informations at the desired rate combined? Do you still having this issue with 4.4.3?