Grab this update via Software Update if you have one of the following machines:
  • MacBook Pro (15-inch)
  • MacBook Pro (15-inch Glossy)
  • MacBook Pro (15-inch Core 2 Duo)
  • MacBook Pro (15-inch 2.4/2.2GHz)
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.