My version of @holman's battery status script

battery-status

#!/bin/bash
#
# battery-status
#
# A quick little indicator for battery status on your Mac laptop, suitable for
# display in your prompt.

battery=$(upower -e | grep BAT)
state=$(upower -i $battery | grep state | tail -1 |awk -F":" '{print $2}' |sed -e 's/\s*//')
time_left=$(upower -i $battery |grep "time to empty" |tail -1 |awk -F":" '{print $2}' | sed -e 's/\s*//')
percent=$(upower -i $battery |grep "percentage"|tail -1 |awk -F":" '{print $2}' | sed -e 's/\s*//')

function val(){
    echo $1 | tail -1 |awk -F":" '{print $2}' |sed -e 's/\s*//'
}

if [[ $state == "discharging" ]]
then
    emoji='ὐb'
else
    emoji='ὐc'
fi

if [[ $time_left == *"(no"* || $time_left == *"not"* ]]
then
    time_left='⌛️ '
fi

if [[ $time_left == *"0:00"* ]]
then
    time_left='⚡️ '
fi

printf "$emoji  $time_left"