#!/bin/sh

BAT_FILE=/sys/class/power_supply/BAT0

for battery in $BAT_FILE; do
	# If non-first battery, print a space separator.
	[ -n "${capacity+x}" ] && printf " "
	# Sets up the status and capacity
	case "$(cat "$battery/status" 2>&1)" in
		"Full") status="🔋" ;;
		"Discharging") status="🔋-" ;;
		"Charging") status="🔋+" ;;
		"Not charging") status="🛑" ;;
		*) exit 1 ;;
	esac
	capacity="$(cat "$battery/capacity" 2>&1)"
	# Will make a warn variable if discharging and low
	[ "$status" = "🔋" ] && [ "$capacity" -le 25 ] && warn="❗"
	# Prints the info
	printf "%s%s%d%%" "$status " "$warn" " $capacity"; unset warn
done && printf "\\n"