How to Save Money on Audi Battery Replacement Is your Audi key fob having difficulty locking and unlocking? This could be a sign the battery is in need of replacing. To replace the battery, flip open the metal key and use a flathead screwdriver to pop up the back cover. https://autolocksmiths33772.uzblog.net/why-audi-a4-spare-key-still-matters-in-2023-44189756