mAh capacity remaining lua not working

ArduPilot Lua Scripting
1

I am trying to use lua script to show battery capacity remaining in a Taranis as per this video and this video and script here:

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Although the starting mAh is displayed, it does not change with power consumption.

I have set the following variables to true.
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Hoping someone with lua experience might help.

2

Unfortunately thats an issue with opentx and not ardupilot lua so im not sure if your going to get help for that here.