Via MacRumors….
AnandTech takes a look at the new MacBook Pros released at WWDC last week and focuses on the new non-removable battery design. Apple first introduced the non-removable battery into the 17″ Unibody MacBook Pro last fall with mixed reactions from the community. Apple’s reasoning behind making the battery custom and non-removable has been the ability to incorporate a larger battery that will provide even longer battery life. They’ve also argued that most laptop owners do not carry spare batteries.
Anandtech found the 15″ MacBook Pro got an additional 46% of battery capacity with no additional weight. Improvements were dramatic in their benchmark testing:

Tags: Apple, MacBook Pro