TLP is an advanced power management tool for Linux. It comes with a default configuration already optimized for battery life. At the same time it is highly customizable to fulfil specific user requirements.
TLP supplies separate settings profiles for AC and battery power and can enable or disable bluetooth, WiFi and WWAN radio devices upon system startup.
For ThinkPads it provides a unified way to configure charging thresholds and recalibrate the battery for all models which support it (via tp-smapi or acpi-call).
TLP is a pure command line tool with automated background tasks, it does not contain a GUI.