Understanding location card badges (need a hint)

[Pedro_Liberal]

Hey everyone, I’ve been exploring the badges for the location cards by following the hints here on this page:

oh-location-card - Location Card

And for the most part it is self explanatory, however I’ve been hitting my head on the wall on one of them:
Low battery badge - I’ve tried a number, a switch, I’ve tried the equipment “battery” but I still cannot get the badge to show.

I’m testing out with an item but I’m missing something, item config below. Help?

version: 1
items:
  Low_battery_warning_test:
    type: Switch
    label: 'Low battery warning test '
    icon: battery
    groups:
      - Office_environmental_sensor
    tags:
      - Battery

[Pedro_Liberal]

Oops I think I got it?! It’s not a battery equipment but a low battery status!

version: 1
items:
  Low_battery_warning_test:
    type: Switch
    label: 'Low battery warning test '
    icon: battery
    groups:
      - Office_environtamental_sensor
    tags:
      - LowBattery
      - Status