FAQ - How to change the reported battery name in a message
In this example we will add the battery type to the name but you can change it to anything you like that helps you identify the battery entity to your liking.
Go into settings / devices & services / click on the entities tab at the top and search for your batteries. Click on the entity you would like to update and then the cog wheel
Change the name to your liking and click update.
When you receive a message the name will now be reflected as per your liking.
You can also adjust the sensor display precision. If your sensor % is reading 30.001% you can adjust the display precision so it will read 30% by select the drop-down menu in display precision.
Enjoy
Blacky 
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