How to Save Money on Audi Battery Replacement Does your Audi key fob have trouble locking and unlocking? This could be a sign the battery is in need of replacing. To replace the battery, simply open the metal key using a flathead and pop the cover off using a screwdriver. https://auto-locksmith86008.blogscribble.com/29905080/the-best-audi-a4-spare-key-methods-to-transform-your-life