Not how I would add variables. Create them in the appropriate tasks. They will be inserted into the variables tab upon creation.
There I can enter the variable name (In this case %BATT_LINE_100_CLR), but when I press the checkmark, nothing shows up, nor can I enter the variable value...
Again, use the vars tab as reference guide for current associate variable values. Create the variables in the task.
Actions like, variable set, variable add, etc, will all 'create' any previously undefined or non-existent variables.
'toggled'?