Custom battery-state-card: secondary_info from another entity

Configuration Frontend
1

I’m using the custom battery-state-card by Max Chodorowski to show the battery and charging state of a Pixel 4 phone:

views:
  - title: Overview
    path: overview
    badges: []
    cards:
      - type: custom:battery-state-card
        title: "Devices"
        entities:
          - entity: sensor.battery_level_2
            name: Pixel 4
            charging_state:
              entity_id: sensor.pixel_4_battery_state
              state: charging

I’d like to use secondary_info to show the charger_type attribute from sensor.pixel_4_battery_state (for example, “wireless”) but can’t figure out how. Is there a way?

2

Have a look at the card-mod gurus in this forum. This should be easily possible.