[Unit]
Description=limit battery charge to 40-80 percent

[Service]
Type=simple
RemainAfterExit=yes
ExecStart=/usr/bin/bash -c '/usr/bin/echo 40 > /sys/class/power_supply/BAT0/charge_control_start_threshold; /usr/bin/echo 80 > /sys/class/power_supply/BAT0/charge_control_end_threshold;'
ExecStop=/usr/bin/bash -c '/usr/bin/echo 95 > /sys/class/power_supply/BAT0/charge_control_end_threshold; /usr/bin/echo 90 > /sys/class/power_supply/BAT0/charge_control_start_threshold;'
#Restart=on-failure

[Install]
WantedBy=multi-user.target