The battery monitor supports a number of power management backends. If it is available, the monitor will attempt to use the freedesktop.org Hardware Abstraction Layer. If it is unavailble or unsupported on your platform, the battery monitor will attempt direct access to the power management system.Not all power management backends are available from all vendors, and some vendors add their own additional backends for specific platforms and hardware. If the battery monitor is misreporting information from your battery see .
