Battery Update 1.3 updates battery firmware and addresses battery performance issues with the 15-inch MacBook Pro. Your computer's power cord must be connected and plugged into a working power source while running this update.

After the Battery Update has been installed, any additional batteries you put in your 15-inch MacBook Pro are automatically updated._X/downloads/061-3567.20071003.0Iu7y/BatteryUpdate1.3.dmg

Program Information Category: Patches and updates Type: Free Version: 1.3 Size: 0.5MB Works on: Mac Product page: here