Falling somewhere between the categories of "pretty neat idea" and "hey, that could be really useful", developer John Starmer has released the MightyMonitor widget, a small widget application that displays the battery status of Apple's wireless keyboard as well as its mighty mouse.

The readout displays remaining battery life as a percentage while the stop light-esque status readout warns the user that less than 25% of original battery life remains if the light is yellow and less than 10% remains if the light turns red.

MightyMonitor is available as a 412 kilobyte download through MacUpdate and requires Mac OS X 10.4 or later to run.