Bash Function to Get Battery Charge

I added these two functions to my bashrc.  The first one is used to get the battery charge, and the second returns the battery’s current capacity.

function bchrg {
      # Returns battery charge as a percentage.
      now=`cat /sys/class/power_supply/BAT0/energy_now`
      full=`cat /sys/class/power_supply/BAT0/energy_full`
      out=`echo $now/$full*100 | bc -l | cut -c 1-5`
      echo "Charge: "$out"%"
  }
  
  function bcap {
      # Returns battery capacity as a percentage.
      design=`cat /sys/class/power_supply/BAT0/energy_full_design`
      current=`cat /sys/class/power_supply/BAT0/energy_full`
      out=`echo $current/$design*100 | bc -l | cut -c 1-5`
      echo "Capacity: "$out"%"
  }

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