This MacBook Pro 15" Retina (Mid 2015) replacement battery fix kit includes all the parts, tools, and adhesive you need to bring your dead laptop back to life! 100% factory tested.Tested and guaranteed to have a capacity greater than 8230 mAh.Spot tested by iFixit staff in San Luis Obispo, CA to ensure consistency of quality and capacity. Battery degradation is an inevitable part of your MacBook Pro's lifespan, extend it with this new replacement battery compatible with MacBook Pro 15" Retina (Mid 2015). Factory-installed MacBook Pro 15" Retina (Mid 2015) batteries are rated to last 1,000 cycles. If your laptop won't turn on, turns off suddenly, has a "service battery" warning, or simply won't hold a charge, this replacement battery may be what you need to fix it. Our aftermarket replacement batteries lead the industry in quality and reliability, so you know you're getting the best money can buy. Part Assembly Includes:New replacement battery compatible with a MacBook Pro 15" Retina (Mid 2015)Installation adhesive Kit Includes:iFixit Adhesive RemoverSafety GlassesNitrile Gloves (2)Berkshire PRO Wipe 880SpudgeriFixit Opening TooliFixit Opening Picks (Set of 6)Plastic CardsAngled TweezersPrecision Bit Driver4 mm Precision Bits:Pentalobe P5Torx T5Torx Security TR6 This part is compatible with MacBook Pro 15" Retina A1398 Mid 2015.