This program uses the conservation_mode of Lonovo Ideapad / Yoga notebook to activate or disable battery charging in order to keep battery level below a customizable threshold.

Battery indicator will still indicate battery is charging, but it will not really charge.

If necessary, install psutil: sudo pip install psutil

Copy script where you like, for example in /usr/local/bin and set it as executable: chmod +x /usr/local/bin/yoga-autocharge.py

Test program as root to ensure it can access battery value. There should be no error.

Add program to crontab to run every minute: run crontab -e and add this line: * * * * * /usr/local/bin/yoga-autocharge.py

Current status can be checked with: cat /sys/bus/platform/drivers/ideapad_acpi/VPC2004:00/conservation_mode

Change these settings to your liking

START_CHARGE_THRESH = 65
STOP_CHARGE_THRESH = 70
FORCE_FULL_BATTERY = False # Set to True if you want to temporary charge your battery to full capacity. Set back to False when done.