Apple has posted Battery Update 1.2, which updates battery firmware and improves battery functionality according to Apple.
The update affects most Intel-based notebooks, including:
* 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)