Markdown Template for Battery measurements

Configuration
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1

Hello everyone,
based on the video from the great content creator Smart Home Junkie (HOW TO create your own Low Battery Warning Sensor In Home Assistant - TUTORIAL - YouTube) I´ve created a simplified version, for all of us that have devices without battery percentage (only battery voltage).

For this you only need a single number helper

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And the following markdown card:

type: markdown
content: >-
  {% for state in states
      | selectattr('domain', 'in', ['sensor'])
      | rejectattr('attributes.battery_voltage', 'undefined') 
      | selectattr('attributes.battery_voltage', 'lessthan', states('input_number.battery_threshold') | int / 10)
      | sort(attribute='attributes.battery_voltage', reverse = True)
  %}

  {{
  '* <ha-alert alert-type="error"><ha-icon
  icon="mdi:battery-alert-variant-outline"></ha-icon> ' 
  + "(" + state.attributes.battery_voltage|string + "V)"
  + "&nbsp;&nbsp;[" + state.state + "%]&nbsp;&nbsp;"
  + state.name | replace(' battery', '') | replace(' Battery', '')| replace('
  power', '') | replace(' Power', '') 
  + "</ha-alert>"
  }}

  {%- endfor -%}
title: To Charge

This allows you to define the threshold value, for the voltage you “think” it´s worth charging/replacing the batteries on your device.

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NOTE: For the calculation, the value is divided by 10, in order to have decimal values for the voltage (this is currently not available for the number helper)

2

Input Numbers are absolutely capable of holding float (decimal) numbers.

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I think there is a bug in the UI where Step Size turns red if you enter a decimal value for step size but if you ignore it and click CREATE / UPDATE it works.
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