My 2015 4 door jk battery dies after a couple of days not starting The battery is new . Has anyone had this problem ?

 

Welcome to the JKF, 1st post welcome. So you have a new battery, hopefully it was fully charged. How many days are a couple of days = 2? Your Jeep has some type of power draw .. you must find the draw of this and correct.
Here is a video on how to check:

 

If you have a Stereo installed and can you describe the power amp.