How do you open key and replace battery for 2008 infiniti g35x?

To open the key fob for a 2008 Infiniti G35x, locate the small slot on the side of the fob and use a flathead screwdriver to gently pry it open. Once the fob is split, remove the old battery (usually a CR2032) and replace it with a new one, ensuring the positive side is facing up. Reassemble the key fob by snapping the two halves back together. Finally, test the key to ensure it’s functioning properly.