Built-in 63.5-watt-hour lithium-polymer battery.

Multi-Touch trackpad for precise cursor control supports inertial scrolling, pinch, rotate, swipe, three-finger swipe, four-finger swipe, tap, double-tap, and drag capabilities.

Full-size backlit keyboard with 78 (U.S.) or 79 (ISO) keys, including 12 function keys and 4 arrow keys (inverted “T” arrangement) with ambient light sensor.

Support for audio line out (digital/analog).

Support for Apple iPhone headset with remote and microphone.802.11n Wi-Fi wireless networking 3 IEEE 802.11a/b/g compatible.HDMI audio and video output using third-party Mini DisplayPort to HDMI Adapter (sold separately).Dual-link DVI output using Mini DisplayPort to Dual-Link DVI Adapter (sold separately).VGA output using Mini DisplayPort to VGA Adapter (sold separately).DVI output using Mini DisplayPort to DVI Adapter (sold separately).Dual display and video mirroring: Simultaneously supports full native resolution on the built-in display and up to 2560 by 1600 pixels on an external display, both at millions of colors.2.9GHz dual-core Intel Core i7 processor (Turbo Boost up to 3.6GHz) with 4MB 元 cache.

2.5GHz dual-core Intel Core i5 processor (Turbo Boost up to 3.1GHz) with 3MB 元 cache.13.3-inch (diagonal) LED-backlit glossy widescreen display with support for millions of colors.The SATA cable is the weak link, one of many reasons Apple went to the PCI-e and soldered-in storage. They can be damaged quite easily if the unit is mishandled during assembly or re-assembly. This type of cable can experience cracks in traces due to aging, heat, vibration, impact and abrasion. Those SATA cables are actually not cables but flexible circuit boards, usually mylar, with printed circuit traces taking the place of wires. As it cools down, electrical contact may once again be restored. As a unit heats up, it expands, and as it expands, the crack widens, eventually forcing a complete electrical separation to exist on both sides of the crack, hence a failure. In the case of an intermittent generic failure, the electrical continuity of a cracked trace on both sides of the crack is very often a function of the temperature of the unit at the point where the crack exists. It is however no mystery why old cables fail when switching from HDD to SSD.

Agreed, a new SATA cable is a nominal expense and highly recommended.

Macbook pro 2012 sata