[TRACKING] Linux battery life tuning

[junaruga]

I was investigating how to improve the battery drain after powered off (shutdown).

Battery slowly drains when completely shut down

I just searched about “battery drain after shut down”. Here are some info. https://www.linuxquestions.org/questions/linux-hardware-18/battery-draining-after-shutdown-4175628580/#post5848862 $ sudo shutdown -H -P +0 -H = halt -P = power off +0 = now The syntax of shutdown changed with systemd. Some things still us OLD methods $(shutdown -h now), which doesn’t always do the things on NEW hardware. There could also be extras like usb ports ON, wake on lan, and such which DO have UEFI option…

I found some tips.

• shutdown -H -P +0 is better than shutdown -h now in a new hardware?
• Is the command like hwclock --systohc --local executed when doing shutdown? If it is, it might cause the battery to drain when the laptop is off.