Management of battery resources of an electronic device are disclosed. The electronic device has a battery, a display in communication with the battery, multiple subsystems in communication with the battery, and a user interface in communication with the subsystems. On the display is presented an indication of usage of the battery resources by the subsystems in executing functions by the device. With the interface, a user directive is received to reallocate the usage of the battery resources. The usage of the battery resources are thus reallocated in accordance with the user directive.