dwmblocks/dwmblocks_scripts/dwm_battery

#!/bin/sh

prct=$(upower -d | grep percentage | sed -n "1p" | sed -e 's/^.* //')
prctonly=$(upower -d | grep percentage | sed -n "1p" | sed -e 's/^.* //' | sed 's/%//')
stat=$(upower -d | grep -m1 state | sed -e 's/^.* //')

## if any argument
if [ $# -gt 0 ]; then
	if [[ $stat == "charging" ]]; then
		echo "BAT +$prct"
		exit
	fi
	echo "BAT -$prct"
	exit
fi

echo $prct