@DaTTcz For now direct battery support not available on Rules. However you can do it from script
. I will update how to handle with script.
Kindly create a request on github page to support battery level on rules.
ALL these features are available on SNAPSHOT build
Enter your condition via script,
Steps:
- Create UID Tag for your node,
- Create script to check node battery level (script type: Condition)
- Create rule with this condition script
- Enjoy

Create UID Tag:

Add script:

Java Script to check battery level,
var myImports = new JavaImporter(java.io, java.lang, java.util, java.text);
with(myImports) {
var mcResult = false; //By default this is false. When your condition meets change this to true
var batteryLevel = mcApi.uidTag().getByUid("node1").resource.batteryLevel;
if(batteryLevel >= 50){ // Your condition
mcResult = true;
}
}
Add rule:
