What is the maintenance schedule for an Audi e-tron battery?

I recently purchased an Audi e-tron and I'm not sure how often the battery needs to be maintained. Can anyone provide me with a detailed maintenance schedule?

According to Audi's official maintenance guide, the e-tron battery should be checked every 10,000 miles or once a year, whichever comes first.

As an Audi technician, I recommend getting the battery checked every 6 months for optimal performance.

I have personally owned an e-tron for 2 years now and I have only had to check the battery once, and it was in perfect condition. Once a year is sufficient.