ArsTechnica guide explains poor MacBook Pro battery life, offers some solutions - NotebookCheck.net News
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KingSener A1493 11.34V 6330mAh battery for laptop Apple MacBook Pro 13 - BatteryMall.com
Amazon.com: A1382 Battery for MacBook Pro 15 inch A1286 Early 2011 Late 2011 Mid 2012 New Replacement Laptop Battery (7200mAh 10.95V/78.84Wh 25 Months Warranty) : Electronics