http://www.apple.com/downloads/macosx/apple/firmware_hardware/batteryupdate12.htmlBattery Update 1.2 updates battery firmware and addresses battery performance issues.
Products Affected
MacBook Pro (17-inch), MacBook Pro (17-inch Core 2 Duo), MacBook Pro (15-inch Glossy), MacBook Pro (15-inch Core 2 Duo), MacBook Pro (original), MacBook (13-inch), MacBook (13-inch Late 2006), Mac OS X 10.4, Mac OS X 10.5
System Requirements
Installation of Battery Update 1.2 requires Mac OS X 10.4.8 or later.
The Battery Update 1.2 supports the following products:
MacBook
MacBook (Late 2006)
MacBook Pro (15-inch)
MacBook Pro (15-inch Glossy)
MacBook Pro (15-inch Core 2 Duo)
MacBook Pro (17-inch)
MacBook Pro (17-inch Core 2 Duo)
Note: After Battery Update has been installed, each battery you insert into your MacBook or MacBook Pro will be updated automatically.
When will the battery be updated?
The BatteryUpdater will check to see if a battery needs to be updated on startup, wake from sleep, and when a battery is inserted. If in these cases there is no AC power supplied, it will then wait until AC power is present and then check to see if the battery needs to be updated. If the battery needs to be updated it will update it automatically. Wait 30 seconds before you validate the installation.
