I used a Variable tile for the exact setup in my dashboard. I basically have a True/False variable and a rule to set this variable to true if any of my sensors battery is below the certain %. Added this variable to dashboard as a Variable Tile, and configure the state mapping to highlight in red if it’s True. Change the Tap Action to open a hyperlink, and use the other dashboard’s link as the URL, so it will navigate to the other dashboard when tapped, which allows me to see which exact sensor(s) is having lower battery %.
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