coconutBattery is an application that monitors the status of a Mac battery. The latest version, 2.5.1, is compatible with the MacBook and Macbook Pro. This freeware app can tell what the current charge of the battery is, what the current capacity is and the original capacity was. It can also detect the model of MacBook it is running on, how old the computer is and how many load cycles the battery has undergone. The program can save battery information for long term analysis as well.
coconutBattery can be downloaded from the author’s site at coconut-flavour.com. The author accepts donations via paypal, please support this program