Audi A5 A6 A7 2019 Smart Key Battery HOW TO change - YouTube
How to replace remote fob battery in Audi A8 (D3)
Amazon.com: HQRP Transmitter and Two Batteries Compatible with Audi TT 2000 2001 2002 2003 2004 00 01 02 03 04 Key-Fob Remote Shell Case Cover Smart Key FOB : Automotive
Amazon.com: ECCPP Replacement for Audi Uncut Keyless Entry Remote Control Car Key Fob Shell Case A4 Quattro/ A6 Quattro/ A8 Quattro/Allroad Quattro/TT Quattro MYT8Z0837231 (Pack of 1) : Everything Else
Remote Flip Key Fob Case Shell 3 Buttons Replacement for Audi A3 A4 A6 Q7 TT - Walmart.com