Can't get charging state to show

Hello, I have this YAML to embed the battery state card into my dashboard:

type: custom:battery-state-card
title: Ladestand
entities:
  - entity: sensor.handy_florian_battery_level
    charging-state:
      entity_id: binary_sensor.handy_florian_is_charging
      icon: mdi:flash
      state: 'on'

Display of battery state works fine, but charging state is ignored, i.e., no visual indication. The entity binary_sensor.handy_florian_is_charging is correct (copy & pasted it directly into the state overview) and is verified on when charging.

Anything I am missing here?

Thanks!

[floli]

@floli there is a mistake on your config in charging_state should be underscore not dash

Ar, now it works:

entities:
  - entity: sensor.handy_florian_battery_level
    charging_state:
      entity_id: binary_sensor.handy_florian_is_charging
      state: 'on'

@OddSquirrel Do you have similar fault? For me, that issue can be closed, problem was between keyboard and chair.

[maxwroc]

@floli there is a mistake on your config in charging_state should be underscore not dash