Apple Has Fully Restored Inventory of Mid 2012 and Early 2013 MacBook Pro Batteries - MacRumors
What is the "real-world" battery life of the "Mid-2012" and "Early 2013" 15-Inch Retina Display MacBook Pro? How does the battery life compare to the "regular" Mid-2012 MacBook Pro and the models
Quality factors relevant for getting a replacement battery (MacBook Pro (13- inch, Mid 2012)) - Ask Different
What is the "real-world" battery life of the "Early 2013" 13-Inch Retina Display MacBook Pro? How does the battery life compare to the 15-Inch Retina Display and 13-Inch "Mid-2012" non-Retina Display MacBook
Fixing Apple's Unfixable MacBook Pro with Retina Display | iFixit News
Review Apple MacBook Pro 15 Retina 2.3 GHz Mid 2012 - NotebookCheck.net Reviews
Determine battery cycle count for Mac notebooks - Apple Support
Apple MacBook Pro with Retina display review (mid 2012) | Engadget