Download of SuperClock 4.0 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free software for Mac OS X was originally created by D. Finnigan. The application lies within System Tools, more precisely Battery Utilities. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe.
From the developer:
SuperClock! displays the time and date near the right end of the menu bar. If you're using a portable Macintosh, it will also display the battery level; the battery icon will include a little lightning bolt when the battery is charging. To use SuperClock!, put it into the System Folder or the Control Panels folder (for System 6.x or 7.x, respectively), and then restart the Macintosh.