What's the cost for a 2019 vw Tiguan key fob battery replacement?

The 2019 Volkswagen Tiguan's key fob or transmitter battery can be changed by separating the back and front sides of the fob and removing and replacing the 3-volt battery inside. The 3-volt CR2025's can be purchased from any general retailer for less than 5 dollars a piece and are the same batteries used in watches and small mechanical devices. Release the folded key inside. Turn over the assembly to locate a small tab at the side of the plastic panel. Depress with finger or a small flathead screwdriver to open. Pop out the used CR2025 using the same flathead screwdriver and replace. Repeat steps in reverse order to close the remote.