battery-state-card Great card but state_map not working for my binary sensors

Describe the bug

When I add my binary sensors (for instance binary_sensor.front_door_keypad_battery), the state_map config does not map the on/off values to 100/0% as desired.

How to reproduce See config below. Note that these sensors are reported as "?" rather than 100/0. See the screenshot.

I tried various "from" states: plain off/on, 0/1, "off"/"on", "Off"/"On"... nothing triggers. From the debug state it looks like "off" should work.

Expected behavior Batteries should show up as 100% or 0% according to off/on state of sensor.

YAML configuration

type: custom:battery-state-card
secondary_info: "{last_changed}"
filter:
  include:
    - name: "attributes.device_class"
      value: "battery"
state_map:
  - from:"off"
    to:100
  - from:"on"
    to:0
sort:
  by: "state"
collapse: 8
debug: false
bulk_rename:
  - from: " Battery"
  - from: " level"
colors:
  steps:
    - '#ff0000'
    - '#ffff00'
    - '#00ff00'
  gradient: true

Entity debug data

{
  "entity_id": "binary_sensor.front_door_keypad_battery",
  "state": "off",
  "attributes": {
    "last_event_info": "System Armed (Home) by Keypad Front Door",
    "last_event_sensor_name": "Front Door",
    "last_event_sensor_type": "keypad",
    "last_event_timestamp": 1712286222,
    "system_id": 4882848,
    "device_class": "battery",
    "friendly_name": "Front door Keypad Battery"
  },
  "context": {
    "id": "01HTQ88GVEPDKSMCT2EQCA6W",
    "parent_id": null,
    "user_id": null
  },
  "last_changed": "2024-04-05T13:48:07.406Z",
  "last_updated": "2024-04-05T13:48:07.406Z",
  "display": {
    "entity_id": "binary_sensor.front_door_keypad_battery",
    "device_id": "f127976adf9908bbf0c09dbfdde1",
    "labels": [],
    "platform": "simplisafe",
    "entity_category": "diagnostic",
    "name": "Battery"
  },
  "device": {
    "area_id": "front_door",
    "configuration_url": "https://webapp.simplisafe.com/new/#/dashboard",
    "config_entries": [
      "d914ea1cffb145d19f4ea9147eff"
    ],
    "connections": [],
    "disabled_by": null,
    "entry_type": null,
    "hw_version": null,
    "id": "f127976adf9908bbf0c09dbfdde1",
    "identifiers": [
      [
        "simplisafe",
        "017fdxxx"
      ]
    ],
    "labels": [],
    "manufacturer": "SimpliSafe",
    "model": "Keypad",
    "name_by_user": null,
    "name": "Front door Keypad",
    "serial_number": null,
    "sw_version": null,
    "via_device_id": "1fbe8255b22b13d2511792a7f5eb"
  },
  "area": {
    "aliases": [],
    "area_id": "front_door",
    "floor_id": "main_floor",
    "icon": null,
    "labels": [],
    "name": "Front Door",
    "picture": null
  }
}

Dev console errors None

Screenshots