# Print current battery charge in percents.
function battery_charge() {
	head -c -1 /sys/class/power_supply/BAT*/capacity
	echo '%'
}

# Get battery's remaining max capacity in percents.
function battery_capacity() {
	local IFS=$'\n'
	local battery=("$(upower --enumerate | grep battery_BAT)")
	upower -i "${battery[0]}" | grep capacity | cut -d\  -f17
}