Power Devil

Power Devil allows you to define your all power settings

Global Settings

Power Devil is configured by accessing System Settings -> Hardware section -> Power Management. The first screen, shown above, allows you to decide which profiles are appropriate in different power states. There is also a drop-down list of configurable notifications. Like most other applications you can set a sound or a flag as your notification, or none at all.

The Advanced Battery Settings tab is where you set your parameters for battery levels, and also decide what action you want to take place when the battery reaches a critical level.

The Power Profiles page starts with the three default profiles, where you can check and uncheck each action.

Even better, at the bottom of the main pane you will see this menu strip:

Here you can develop your own profiles for specific purposes.