Battery conservation mode for Ideapad

conservation_mode.sh

#!/bin/sh
# A shell script to enable/disable battery conservation mode
# in my ideapad gaming 3 laptop
# conservation mode is basically a battery charging limiter
# to keep the battery within 55-60%.
# Good when I plug the charger all the time (which mostly I do)
# Not good for traveling
# Reference: https://wiki.archlinux.org/title/Laptop/Lenovo#Battery_Conservation_Mode_on_IdeaPad_laptops
#
# Sid

SCRIPT_NAME=$0
print_usage () {
	echo "Usage: $SCRIPT_NAME on|off|status"
}

if [ $# -ne 1 ]; then
	print_usage
	exit 0
fi

CONFIG_FILE="/sys/bus/platform/drivers/ideapad_acpi/VPC2004:00/conservation_mode"
STATUS=`cat $CONFIG_FILE`
ARG=$1


print_status () {
	echo -n "Conservation mode is "
	if [ $STATUS -eq 1 ]; then
		echo "active."
	else
		echo "inactive."
	fi
}

write_config () {
	echo $1 > $CONFIG_FILE
}

if [ $ARG == "on" ]; then
	STATUS=1
	write_config $STATUS
	print_status
elif [ $ARG == "off" ]; then
	STATUS=0
	write_config $STATUS
	print_status
elif [ $ARG == "status" ]; then
	print_status
else
	print_usage
fi