@itn3rd77 A very fair question and one I totally missed. Also - I had to learn where the logs are - thanks for that. Now in the below logs, I am real sure some errors were my first attempts at using your blueprint. These entries are from the System Log. Your help is appreciated!
Logger: homeassistant.components.automation
Source: components/automation/__init__.py:285
Integration: Automation (documentation, issues)
First occurred: January 6, 2023 at 3:12:24 PM (184 occurrences)
Last logged: 9:39:44 AM
Blueprint Low battery level detection & notification for all battery sensors generated invalid automation with inputs OrderedDict([('exclude', OrderedDict([('entity_id', []), ('device_id', '6dc0eb59eaf6c2244bf1b463608d6e94')])), ('actions', [OrderedDict([('device_id', 'adb84ebfcbea70464b0f5eeb8b1412ee'), ('domain', ''), ('entity_id', '')])]), ('time', '15:03:00')]): Integration '' not found. Got <homeassistant.components.blueprint.models.BlueprintInputs object at 0xffffaee70ca0>
Blueprint Low battery level detection & notification for all battery sensors generated invalid automation with inputs OrderedDict([('time', '14:39:00'), ('actions', [OrderedDict([('device_id', 'adb84ebfcbea70464b0f5eeb8b1412ee'), ('domain', ''), ('entity_id', '')])])]): Integration '' not found. Got <homeassistant.components.blueprint.models.BlueprintInputs object at 0xffffa7a9e9b0>
Blueprint Low battery level detection & notification for all battery sensors generated invalid automation with inputs OrderedDict([('day', 0), ('time', '14:47:00'), ('actions', [OrderedDict([('device_id', 'adb84ebfcbea70464b0f5eeb8b1412ee'), ('domain', ''), ('entity_id', '')])])]): Integration '' not found. Got <homeassistant.components.blueprint.models.BlueprintInputs object at 0xffff83dc7c40>
Blueprint Low battery level detection & notification for all battery sensors generated invalid automation with inputs OrderedDict([('time', '14:52:00'), ('actions', [OrderedDict([('device_id', 'adb84ebfcbea70464b0f5eeb8b1412ee'), ('domain', ''), ('entity_id', '')])])]): Integration '' not found. Got <homeassistant.components.blueprint.models.BlueprintInputs object at 0xffff86185000>
Blueprint Low battery level detection & notification for all battery sensors generated invalid automation with inputs OrderedDict([('exclude', OrderedDict([('entity_id', []), ('device_id', '6dc0eb59eaf6c2244bf1b463608d6e94')])), ('actions', [OrderedDict([('device_id', 'adb84ebfcbea70464b0f5eeb8b1412ee'), ('domain', ''), ('entity_id', '')])]), ('time', '15:03:00')]): Integration '' not found. Got <homeassistant.components.blueprint.models.BlueprintInputs object at 0xffff7e525870>
Logger: homeassistant.components.automation
Source: components/automation/__init__.py:248
Integration: Automation (documentation, issues)
First occurred: January 6, 2023 at 3:03:59 PM (4 occurrences)
Last logged: January 6, 2023 at 3:04:02 PM
Blueprint Low battery level detection & notification for all battery sensors generated invalid automation with inputs OrderedDict([('time', '14:39:00'), ('actions', [OrderedDict([('device_id', 'adb84ebfcbea70464b0f5eeb8b1412ee'), ('domain', ''), ('entity_id', '')])])]): Integration '' not found. Got <homeassistant.components.blueprint.models.BlueprintInputs object at 0xffff97cb0610>
Blueprint Low battery level detection & notification for all battery sensors generated invalid automation with inputs OrderedDict([('day', 0), ('time', '14:47:00'), ('actions', [OrderedDict([('device_id', 'adb84ebfcbea70464b0f5eeb8b1412ee'), ('domain', ''), ('entity_id', '')])])]): Integration '' not found. Got <homeassistant.components.blueprint.models.BlueprintInputs object at 0xffff97cb09a0>
Blueprint Low battery level detection & notification for all battery sensors generated invalid automation with inputs OrderedDict([('time', '14:52:00'), ('actions', [OrderedDict([('device_id', 'adb84ebfcbea70464b0f5eeb8b1412ee'), ('domain', ''), ('entity_id', '')])])]): Integration '' not found. Got <homeassistant.components.blueprint.models.BlueprintInputs object at 0xffff97cb0940>
Blueprint Low battery level detection & notification for all battery sensors generated invalid automation with inputs OrderedDict([('exclude', OrderedDict([('entity_id', []), ('device_id', '6dc0eb59eaf6c2244bf1b463608d6e94')])), ('actions', [OrderedDict([('device_id', 'adb84ebfcbea70464b0f5eeb8b1412ee'), ('domain', ''), ('entity_id', '')])]), ('time', '15:03:00')]): Integration '' not found. Got <homeassistant.components.blueprint.models.BlueprintInputs object at 0xffff97b7d600>