Dodge Challenger 2018 Owner's Manual page 24

22 GETTING TO KNOW YOUR VEHICLE
Separating Case With A Coin Key Fob Battery Replacement
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, and then replace
the battery. When replacing the battery, match the + sign
on the battery to the + sign on the inside of the battery
clip, located on the back cover. Avoid touching the new
battery with your fingers. Skin oils may cause battery
deterioration. If you touch a battery, clean it with
rubbing alcohol.
4. To assemble the key fob case, snap the two halves
together.