HASESS A1618 Battery Compatible with MacBook Pro 15inch A1398 A1618 Battery with Two Free Screwdrivers 11.36V 8755mAh/99.5Wh - 18 Months Warranty High capacity 8755mAh/99.5Wh Li-Polymer replacement laptop battery for 2015 new model Macbook pro 15.4inch Retina A1398 A1618 fit for 020-00079 MJLQ2LL/A MJLT2LL/A;Voltage:11.36V 100% New from Manufacturer,High Performance notebook battery compatible with Macbook pro 15.4 Retina A1398 A1618 Overcharger and Discharger Circuit Protection,CE-/FCC-/RoHS-Certified for safety. Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability. 30 days money return and 18 Months Manufacturer Warranty, 100% Satisfaction Guaranteed.The actual operation time will depend on how much electricity is required by the device and how you use it.