Get the correct replacement battery for your Jeep key fob
Locate the seam or release point on the key fob
Remove the emergency key if your fob has one
Use a small flat tool or your fingernail to carefully pry the fob open
Separate the two halves of the key fob
Remove the old battery
Note the battery orientation before removing it
Insert the new battery in the same orientation
Snap the key fob halves back together
Reinsert the emergency key if removed
Test the key fob to confirm it works