On October 20, 2009, Apple released a MacBook that introduced a new polycarbonate (plastic) unibody design, faster DDR3 memory, a multi-touch trackpad, an LED-backlit display, and a built-in seven-hour battery. The polycarbonate unibody MacBook, like its aluminum predecessor, lacks FireWire and, like the 13-inch MacBook Pro, has a combined
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macbook pro 13 inch 2015 battery
