Battery level

The Battery level condition passes when a battery reading meets a threshold you define. You can check that a battery is above, below, or within a specific percentage range. Use it to run an automation only when a device still has enough charge, or only when its battery is getting low enough to need attention.

Using this condition from the user interface

If you prefer building automations visually, Home Assistant walks you through this condition step by step. You pick what to check, tweak a few options, and save. No YAML knowledge required.

To use Battery level in an automation:

1. Go to Settings > Automations & scenes.
2. Open an existing automation, or select Create automation > Create new automation.
3. In the And if section, select Add condition.
4. Select what you want to check. Under By target (see Targets), pick the area your battery-powered device is in (like your hallway or garden). You can also select a device, a specific entity, or a label.
5. From the conditions shown for that target, select Battery level.
6. Under Threshold type, set the battery level the condition checks against:
   1. Pick whether the reading must be Above, Below, In range, or Outside range of the threshold.
   2. Select Number or Entity:
      • Number: Enter a fixed percentage directly, for example 20 for 20%. For In range or Outside range, enter both a lower and upper bound.
      • Entity: Use a sensor entity or a number helper entity as the threshold:
        • Number helper: You can adjust the threshold value without editing the automation. The battery reading is compared against the number helper’s current value.
        • Sensor: Its current reading becomes the threshold and updates automatically as the sensor changes.
        • For In range or Outside range, you need two entities: one for the lower bound and one for the upper bound (for example, two separate number helpers).
        • If you don’t have a number helper, you can create one by selecting Create a new number helper.
7. Under Condition passes if (see Behavior), pick Any or All.
8. Select Save.

Options in the UI

Using this condition in YAML

If you work directly in YAML, or you want to know exactly what Home Assistant does under the hood, this section has the technical reference. It lists the field names you use in YAML, their types, and which ones are required.

In YAML, refer to this condition as battery.is_level. A basic example looks like this:

condition: battery.is_level
target:
  entity_id: sensor.front_door_sensor_battery
options:
  threshold:
    type: below
    value:
      number: 20

This passes when the front door sensor battery reads below 20%.

To check that a battery still has plenty of charge:

condition: battery.is_level
target:
  area_id: hallway
options:
  threshold:
    type: above
    value:
      number: 50
  behavior: all

This passes when every battery-powered device in the hallway area reads above 50%.

To check that a battery is in a healthy charge range:

condition: battery.is_level
target:
  entity_id:
    - sensor.front_door_sensor_battery
    - sensor.garden_camera_battery
options:
  threshold:
    type: between
    value_min:
      number: 20
    value_max:
      number: 101

This passes when at least one of the batteries reads between 21% and 100%. The between threshold is exclusive, so value_max with number: 101 is used to include a reading of 100%.

To use a number helper as a dynamic threshold that you can adjust without editing the automation:

condition: battery.is_level
target:
  entity_id: sensor.front_door_sensor_battery
options:
  threshold:
    type: below
    value:
      entity: input_number.low_battery_alert_threshold

This passes when the front door sensor battery reads below the number helper’s value.

Options in YAML

Targets of the condition

This condition requires a target. The target is the object that Home Assistant will check. You can point the condition at a single entityAn entity represents a sensor, actor, or function in Home Assistant. Entities are used to monitor physical properties or to control other entities. An entity is usually part of a device or a service. [Learn more], a device, an area, a floor, or a label, and Home Assistant will evaluate every matching battery entity behind that target.

• Entity: one specific battery entity, such as battery.living_room.
• Device: every battery entity that belongs to a device.
• Area: every battery entity in a room or area.
• Floor: every battery entity on a floor.
• Label: every battery entity that shares a label.

You can also select different target types in one condition. For example, you can add a specific entity and an area as targets in the same condition to check both of them at once.

Behavior with multiple targets

When you target more than one entity (or select an area, floor, or label that contains several), the Condition passes if option controls how the results combine:

• Any (default): the condition passes if at least one of the targeted entities matches. For example, if you check three smoke sensors and only one of them detects smoke, the condition still passes. This is useful for questions like “is there smoke anywhere in the house?”
• All: the condition passes only when every targeted entity matches. For example, if you check the same three smoke sensors, the condition passes only once all three report cleared. This is useful for “is the entire house safe now?” checks, so your automation does not send an all-clear while one room still has a reading.

Good to know

• The condition works with sensors that have the battery device class.
• Entities that are unavailable (unavailable) or have an unknown state (unknown) are skipped for Any and fail for All.
• Battery level is expressed as a percentage from 0 to 100.
• This condition checks the entity’s current battery reading. To react to changes in the reading, use the Battery level changed or Battery level crossed threshold trigger instead.
• When you use a sensor as a dynamic threshold, its value is read at the moment the condition runs. The threshold is not continuously tracked; it is re-evaluated each time the automation fires.
• For an overview of the status of your battery entitiesAn entity represents a sensor, actor, or function in Home Assistant. Entities are used to monitor physical properties or to control other entities. An entity is usually part of a device or a service. [Learn more], open the Maintenance dashboard. This dashboard allows you to quickly see which batteries need replacing.

Try it yourself

Ready to test this? Go to Settings > Automations & scenes, open an automation, and add this condition. Trigger the automation with and without the condition met, and watch whether it continues or stops.

More examples

Real scenarios where this condition gates an automation. Copy any example and adapt it to your setup.

Automation: skip a weekly reminder when batteries are low

This automation sends a weekly reminder to test your smoke detectors, but only when every detector still has at least 25% battery. If any battery is low, the reminder is skipped so you can replace the batteries first.

• Trigger: Time: Every Sunday at 10:00
• Condition: Battery level (above 25%)
  • Target: Smoke detector batteries
  • Condition passes if: All
• Action: Send a notification message
  • Target: My device (notify.my_device)

alias: "Weekly smoke detector test reminder"
triggers:
  - trigger: time
    at: "10:00:00"
conditions:
  - condition: time
    weekday:
      - sun
  - condition: battery.is_level
    target:
      label_id: smoke_detectors
    options:
      threshold:
        type: above
        value:
          number: 25
      behavior: all
actions:
  - action: notify.send_message
    target:
      entity_id: notify.my_device
    data:
      message: "Time to test your smoke detectors."

Still stuck?

The Home Assistant community is quick to help: join Discord for real-time chat, post on the community forum with the condition you’re using and what you expected to happen, or share on our subreddit /r/homeassistant.

Related conditions

These conditions work well alongside this one:

• Battery is charging: Tests if one or more battery-powered devices are charging.

• Battery is not charging: Tests if one or more battery-powered devices are not charging.

• Battery is low: Tests if one or more batteries are reporting a low charge.

• Battery is not low: Tests if one or more batteries are not reporting a low charge.