Energizer Battery - CR2032 - https://amzn.to/2Qua8lV
2032 off eBay - http://ebay.us/vX6q9H
The instructions in this tutorial will work in the following model years:
– Audi A4 B9 2017 and 2018
– Audi A5 F5 2018
– Audi Q7 2nd Gen. 2017 and 2018
– Audi TT 8S 2016, 2017 and 2018

DIY How to replace your Smart Key Fob Battery for a Audi A3, A4, A5, S4, S5, S6 or Q7 that use the remote. This uses a CR2032 replacement battery. This is helpful especially if the battery is too weak to start the car.

A DIY battery replacement for the Audi Advanced Key Fob! No extra tools required! Currently for Audi A4, A4 allroad, S4, A5, S5, TT, TT RS, Q5, SQ5, Q7 - 2017 models or later with Audi Advanced Key. The replacement battery is an CR2032.