iFixit: New MacBook Pro has first 'DIY-friendly' battery replacement design since 2012 - 9to5Mac
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MacBook Pro 13" Retina Display Late 2012 Battery Replacement - iFixit Repair Guide
Apple Has Fully Restored Inventory of Mid 2012 and Early 2013 MacBook Pro Batteries - MacRumors
2012 MacBook Pro 15" Retina A1398 EMC 2512 Apple Original A1417 Genuine Battery 6903690005062 | eBay