iFixit’s mid 2010 MacBook Pro teardown reveals a few interesting tidbits:
Apple has stopped using five-point Torx screws found on other MBP 15″ Unibodies in favor of Tri-Wing screws The battery is now rated at 77.5 Wh. That’s just a tad bit more than the 73 Wh battery found in last year’s 15″ model, but not enough to explain the 1-2 hour battery life improvement Apple is claiming for this machine. Sound improvement: Apple changed the design of the speaker assembly slightly, moving from a single plastic enclosure to separate plastic enclosures for the speaker & subwoofer that are connected by the speaker leads. The Wi-Fi/Bluetooth board location has changed to more closely resemble the MacBooks’. Because of the metal enclosure of the MBP, Apple added an antenna on the opening of the Superdrive! New Intel BD82HM55 S LGZS Platform Controller Hub. – assumed chip is switch between the Intel and NVIDIA graphics.
