How to change critically low battery value?

Question

I would like my laptop to hibernate itself when the battery level is 10% to be sure it has enough power to complete the operation properly. Actually if I don't pay attention my laptop informs me it will hibernate when it's too late, so instead it brutally shuts down. This kills lithium battery and is not acceptable.

Answer 1

Start dconf-editor.
Browse to org->gnome->settings-daemon->plugins->power.
Change the values of percentage-critical and percentage-action to the level you require.
And change use-time-for-policy to false

You can also do this from a terminal with:

gsettings set org.gnome.settings-daemon.plugins.power percentage-critical 10
gsettings set org.gnome.settings-daemon.plugins.power percentage-action 9
gsettings set org.gnome.settings-daemon.plugins.power use-time-for-policy false