Battery Monitor

Records the performance of your battery over a discharge cycle by writing The Power and estimated remaining time to a text file every minute. You can then use this list of values to see if it works as it should. (E.g., does it discharge fully or does it break down prematurely?) Note that this tool does nothing magical. It simply records to a file what you can see when you use a Stop Watch and look at the battery indicator in the control strip or menu bar. Note: This software is not usable on current Mac computers running Mac OS X. It only functions on the discontinued Mac OS 8 and 9 versions!