Please confirm that your laptop's model number, the original battery's part number and your laptop's version correctly match this replacement battery. You can access this information on your computer by:
About this Mac -->More info... -->Serial number-->Check your laptop's version on Apple's offical website or Google the serial number.

Compatible Apple MacBook Pro 13" Retina Battery Part Numbers:
A1494 A1398 ME293 or ME294

Compatible Apple MacBook Pro 15" Retina Model Numbers:
Macbook Pro Retina Me293 (Late 2013)
MacBook Pro 15" Retina Display Late 2013
2.0 GHz (IG, Late 2013), 2.3 GHz (DG, Late 2013),
2.3 GHz (IG, Late 2013), 2.6 GHz (DG, Late 2013), 2.6 GHz (IG, Late 2013)
MacBook Pro 15" Retina Display Mid 2014
2.2 GHz (IG, Mid 2014), 2.5 GHz (DG, Mid 2014),
2.5 GHz (IG, Mid 2014), 2.8 GHz (DG, Mid 2014), 2.8 GHz (IG, Mid 2014)

For this MacBook Pro 15'' A1398 Only fit Late 2013 Mid 2014 Version,it won't fit 2012 and Early 2013 Version