TREE.NB A1502 A1582 Laptop Battery Compatible for Apple MacBook Pro Retina Inch Retina A1502 (Early 2015 Mid 2014 Late 2013) A1493 Battery - Long Lasting (74.9Wh/11.42V)

You need to turn off your laptop and disconnect the power.
Remove the old battery, carefully install the new battery on the battery case, and connect the wiring of the new battery.
If you don't understand the above steps, you can search for the video about laptop battery installation on YouTube. Maybe it will help you.

EMC: 2678,2835,2875
A1582 A1493 Battery Compatible with MacBook Models:
MacBookPro12,1 MacBook Pro 13 inch A1502 Early 2015
MacBookPro11,1 MacBook Pro 13 inch A1502 Mid 2014
MacBookPro11,2 MacBook Pro 13 inch A1502 Late 2013

Compatible with MacBook Pro Part Numbers:
MJLU2LL/AMF841LL/AMF839LL/A
BTO/CTOMGX92LL/AMGX72LL/A
ME867LL/AME864LL/AMGX72LL/A
MF843LL/A,MGXD2LL/A, ME866LL/A

New battery: For use a new battery, youd better try a few cycles of discharging to 5%. then charging up to 95%. So that it can be activated completely
Overuse: Do not always run out of a battery to 0%, this would make it damaged or usage life shortened
Charging sequence: when charging, first install the battery, then turn on the power, when fully charged, first cut off the power, then pull the power plug.
Long-term storage:Please store the unused battery fully charged.(Charge it once a month) Do not store at low power to prevent reduce the lifespan of a battery
Charger: Do not replace the laptop adapter casually. If the original adapter cannot be applied due to malfunction or damage, please replace the models, so as not to reduce the service life of the battery due to incompatibility.

Install A New Battery How to Purchase the Correct Replacement Battery? Wide Compatibility Laptop Maintenance Tips