If you want to able to use your laptop whenever, it is the bes to keep your battery as good a state as possible. This is especially true for Intel portable CPUs that can have fanciful specs for battery life and sometimes have problems.
A technical note issued by Apple in this regard give the calibration procedure ( http://docs.info.apple.com/article.html?path=Mac/10.5/en/9036.html ). Here is the content:
To calibrate the battery:
1 - Connect the MagSafe power connector and recharge the MacBook or MacBook Pro battery until the light of the adapter turns green and the battery icon displayed in the menu bar indicates Loaded.
2 - Let the battery remain fully charged for at least two hours. You can use your computer during that time but you need to leave the power adapter connected.
3 - Disconnect the power adapter while leaving the computer switched on to use the
