Dodge DURANGO 2017 Owner's Manual page 24

22 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE
2. Insert the tip of the emergency key, #2 flat blade
screwdriver, or a coin into the slot and gently pry the
two halves of the key fob apart. Make sure not to
damage the seal during removal.
Separating Key Fob Case With Emergency Key
Separating Key Fob Case With A Coin
3. Remove the battery by turning the back cover over
(battery facing downward) and tapping it lightly on a
solid surface such as a table or similar, then replace the
battery.